euiyulsong/threedata · Datasets at Hugging Face

id stringlengths 8 22 ⌀	question stringlengths 17 586 ⌀	choices dict	answerKey stringclasses 9 values	prompt stringlengths 74 739 ⌀	chosen stringlengths 14 159 ⌀	rejected stringlengths 13 146 ⌀	text stringlengths 15 811
Mercury_7043838	What is the main source of energy that drives all weather patterns?	{ "label": [ "A", "B", "C", "D" ], "text": [ "the Sun", "oceans", "the Moon", "mountains" ] }	A	Question: What is the main source of energy that drives all weather patterns? (A) the Sun (B) oceans (C) the Moon (D) mountains	Answer: (A) the Sun	Answer: (B) oceans	Question: What is the main source of energy that drives all weather patterns? (A) the Sun (B) oceans (C) the Moon (D) mountains Answer: (A) the Sun
Mercury_7001838	Which property of an element is determined by adding the number of protons and number of neutrons?	{ "label": [ "A", "B", "C", "D" ], "text": [ "atomic mass", "atomic radius", "electrical charge", "electrical potential" ] }	A	Question: Which property of an element is determined by adding the number of protons and number of neutrons? (A) atomic mass (B) atomic radius (C) electrical charge (D) electrical potential	Answer: (A) atomic mass	Answer: (C) electrical charge	Question: Which property of an element is determined by adding the number of protons and number of neutrons? (A) atomic mass (B) atomic radius (C) electrical charge (D) electrical potential Answer: (A) atomic mass
ACTAAP_2013_5_15	Compared to other stars in our galaxy, which is the best description of our Sun?	{ "label": [ "A", "B", "C", "D" ], "text": [ "larger size, higher temperature", "smaller size, higher temperature", "larger size, average temperature", "average size, average temperature" ] }	D	Question: Compared to other stars in our galaxy, which is the best description of our Sun? (A) larger size, higher temperature (B) smaller size, higher temperature (C) larger size, average temperature (D) average size, average temperature	Answer: (D) average size, average temperature	Answer: (B) smaller size, higher temperature	Question: Compared to other stars in our galaxy, which is the best description of our Sun? (A) larger size, higher temperature (B) smaller size, higher temperature (C) larger size, average temperature (D) average size, average temperature Answer: (D) average size, average temperature
null	null	null	null	null	null	null	Some dandelions have health benefits.
MCAS_2001_8_7	When igneous rock is changed into metamorphic rock, which form of energy is this process?	{ "label": [ "A", "B", "C", "D" ], "text": [ "heat", "chemical", "magnetic", "light" ] }	A	Question: When igneous rock is changed into metamorphic rock, which form of energy is this process? (A) heat (B) chemical (C) magnetic (D) light	Answer: (A) heat	Answer: (D) light	Question: When igneous rock is changed into metamorphic rock, which form of energy is this process? (A) heat (B) chemical (C) magnetic (D) light Answer: (A) heat
null	null	null	null	null	null	null	Most electric charge uses energy.
null	null	null	null	null	null	null	Cell type-specific rescue experiments indicate that the regulation of roaming and dwelling is distributed among multiple sensory neurons.
null	null	null	null	null	null	null	Some mothers share patterns.
MCAS_2007_8_5186	Which of the following is a characteristic of all chemical changes?	{ "label": [ "A", "B", "C", "D" ], "text": [ "A different state of matter is produced.", "Some mass is converted to energy.", "Some form of light is given off.", "A new material is formed." ] }	D	Question: Which of the following is a characteristic of all chemical changes? (A) A different state of matter is produced. (B) Some mass is converted to energy. (C) Some form of light is given off. (D) A new material is formed.	Answer: (D) A new material is formed.	Answer: (A) A different state of matter is produced.	Question: Which of the following is a characteristic of all chemical changes? (A) A different state of matter is produced. (B) Some mass is converted to energy. (C) Some form of light is given off. (D) A new material is formed. Answer: (D) A new material is formed.
Mercury_SC_408364	Tim and Carla play catch with a ball. Which term describes the motion of a ball?	{ "label": [ "A", "B", "C", "D" ], "text": [ "shape", "size", "speed", "weight" ] }	C	Question: Tim and Carla play catch with a ball. Which term describes the motion of a ball? (A) shape (B) size (C) speed (D) weight	Answer: (C) speed	Answer: (D) weight	Question: Tim and Carla play catch with a ball. Which term describes the motion of a ball? (A) shape (B) size (C) speed (D) weight Answer: (C) speed
null	null	null	null	null	null	null	They pick insects off of foliage
null	null	null	null	null	null	null	Though these two populations spend a period of the year in the same place, and though there was evidence of gene flow between them, the difference in prey–habitat specialization has been sufficient to maintain genetic and even coloration divergence.
Mercury_7168840	A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next?	{ "label": [ "A", "B", "C", "D" ], "text": [ "The organisms built up a resistance to the mercury.", "The mercury passed through the food chain.", "The plankton made the mercury safe.", "The fish would not eat the plankton." ] }	B	Question: A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next? (A) The organisms built up a resistance to the mercury. (B) The mercury passed through the food chain. (C) The plankton made the mercury safe. (D) The fish would not eat the plankton.	Answer: (B) The mercury passed through the food chain.	Answer: (A) The organisms built up a resistance to the mercury.	Question: A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next? (A) The organisms built up a resistance to the mercury. (B) The mercury passed through the food chain. (C) The plankton made the mercury safe. (D) The fish would not eat the plankton. Answer: (B) The mercury passed through the food chain.
Mercury_7024920	In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Sinks are empty.", "Glassware is clean.", "Eye protection is worn.", "Electrical equipment is off." ] }	C	Question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow? (A) Sinks are empty. (B) Glassware is clean. (C) Eye protection is worn. (D) Electrical equipment is off.	Answer: (C) Eye protection is worn.	Answer: (A) Sinks are empty.	Question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow? (A) Sinks are empty. (B) Glassware is clean. (C) Eye protection is worn. (D) Electrical equipment is off. Answer: (C) Eye protection is worn.
null	null	null	null	null	null	null	If this happens, natural selection may favor individuals with the adaptive mutation.
AIMS_2009_4_6	Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Metal doesn't get hot and melt when you plug it into the outlet.", "Metal is strong and is less likely to break when you plug it into the outlet.", "Metal is an insulator and prevents shocks when you plug it into the outlet.", "Metal is a conductor and completes a circuit when you plug it into the outlet." ] }	D	Question: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal? (A) Metal doesn't get hot and melt when you plug it into the outlet. (B) Metal is strong and is less likely to break when you plug it into the outlet. (C) Metal is an insulator and prevents shocks when you plug it into the outlet. (D) Metal is a conductor and completes a circuit when you plug it into the outlet.	Answer: (D) Metal is a conductor and completes a circuit when you plug it into the outlet.	Answer: (C) Metal is an insulator and prevents shocks when you plug it into the outlet.	Question: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal? (A) Metal doesn't get hot and melt when you plug it into the outlet. (B) Metal is strong and is less likely to break when you plug it into the outlet. (C) Metal is an insulator and prevents shocks when you plug it into the outlet. (D) Metal is a conductor and completes a circuit when you plug it into the outlet. Answer: (D) Metal is a conductor and completes a circuit when you plug it into the outlet.
Mercury_7213185	Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Pacific Ocean", "Colorado River", "Sierra Nevada Mountains", "Columbia River Basin" ] }	C	Question: Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain? (A) Pacific Ocean (B) Colorado River (C) Sierra Nevada Mountains (D) Columbia River Basin	Answer: (C) Sierra Nevada Mountains	Answer: (A) Pacific Ocean	Question: Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain? (A) Pacific Ocean (B) Colorado River (C) Sierra Nevada Mountains (D) Columbia River Basin Answer: (C) Sierra Nevada Mountains
MCAS_2008_5_5635	Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile?	{ "label": [ "A", "B", "C", "D" ], "text": [ "The bacteria break down water into food.", "The bacteria change sunlight into minerals.", "The bacteria combine with sand to form rocks.", "The bacteria break down plant and animal matter." ] }	D	Question: Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile? (A) The bacteria break down water into food. (B) The bacteria change sunlight into minerals. (C) The bacteria combine with sand to form rocks. (D) The bacteria break down plant and animal matter.	Answer: (D) The bacteria break down plant and animal matter.	Answer: (B) The bacteria change sunlight into minerals.	Question: Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile? (A) The bacteria break down water into food. (B) The bacteria change sunlight into minerals. (C) The bacteria combine with sand to form rocks. (D) The bacteria break down plant and animal matter. Answer: (D) The bacteria break down plant and animal matter.
Mercury_7081795	Which is a major organ of the nervous system?	{ "label": [ "A", "B", "C", "D" ], "text": [ "brain", "stomach", "lung", "bone" ] }	A	Question: Which is a major organ of the nervous system? (A) brain (B) stomach (C) lung (D) bone	Answer: (A) brain	Answer: (B) stomach	Question: Which is a major organ of the nervous system? (A) brain (B) stomach (C) lung (D) bone Answer: (A) brain
Mercury_SC_400326	Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate?	{ "label": [ "A", "B", "C", "D" ], "text": [ "dark moths in any environment", "light moths in any environment", "dark moths in a light environment", "light moths in a light environment" ] }	D	Question: Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate? (A) dark moths in any environment (B) light moths in any environment (C) dark moths in a light environment (D) light moths in a light environment	Answer: (D) light moths in a light environment	Answer: (C) dark moths in a light environment	Question: Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate? (A) dark moths in any environment (B) light moths in any environment (C) dark moths in a light environment (D) light moths in a light environment Answer: (D) light moths in a light environment
null	null	null	null	null	null	null	Strong teeth are found in those fishes which feed on crabs or sea urchins.
null	null	null	null	null	null	null	Question: What did John and the speaker develop over the years? (A) language (B) sign (C) code (D) symbol Answer: (B) sign
null	null	null	null	null	null	null	Some of these limestone rocks become exposed above the sea.
null	null	null	null	null	null	null	The classification of all organisms based on shared characteristics; changes as new discoveries are made.
null	null	null	null	null	null	null	Most live arthropods have heads.
Mercury_406774	Organisms that reproduce asexually generally have offspring that are	{ "label": [ "A", "B", "C", "D" ], "text": [ "unicellular.", "multicellular.", "genetically varied.", "genetically identical." ] }	D	Question: Organisms that reproduce asexually generally have offspring that are (A) unicellular. (B) multicellular. (C) genetically varied. (D) genetically identical.	Answer: (D) genetically identical.	Answer: (C) genetically varied.	Question: Organisms that reproduce asexually generally have offspring that are (A) unicellular. (B) multicellular. (C) genetically varied. (D) genetically identical. Answer: (D) genetically identical.
null	null	null	null	null	null	null	DNA crosses over and nonsister chromatids break and rejoin to the others DNA, there is also a movement of centrosomes, breaksown of the nuclear envelope and dispersal of nucleoli.
null	null	null	null	null	null	null	Geographicdistribution of the three major amphibian taxa differs.
null	null	null	null	null	null	null	Some human activities have direct impact.
MCAS_2015_5_4	Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Decomposition adds silt to soil.", "Decomposition adds water to soil.", "Decomposition adds oxygen to soil.", "Decomposition adds nutrients to soil." ] }	D	Question: Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils? (A) Decomposition adds silt to soil. (B) Decomposition adds water to soil. (C) Decomposition adds oxygen to soil. (D) Decomposition adds nutrients to soil.	Answer: (D) Decomposition adds nutrients to soil.	Answer: (B) Decomposition adds water to soil.	Question: Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils? (A) Decomposition adds silt to soil. (B) Decomposition adds water to soil. (C) Decomposition adds oxygen to soil. (D) Decomposition adds nutrients to soil. Answer: (D) Decomposition adds nutrients to soil.
null	null	null	null	null	null	null	Their mainly vegetarian diet is supplemented with insects, grubs, eggs, baby birds, and sometimes rodents and hares.
Mercury_7130795	When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision?	{ "label": [ "A", "B", "C", "D" ], "text": [ "electrical", "electromagnetic", "magnetic", "sound" ] }	D	Question: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision? (A) electrical (B) electromagnetic (C) magnetic (D) sound	Answer: (D) sound	Answer: (A) electrical	Question: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision? (A) electrical (B) electromagnetic (C) magnetic (D) sound Answer: (D) sound
null	null	null	null	null	null	null	Some mechanisms have experimental evidence.
null	null	null	null	null	null	null	most of Earth is covered by water;
null	null	null	null	null	null	null	There are around 12 000 types of ferns that differ in size, morphology and type of habitat.
null	null	null	null	null	null	null	T or F: Metacentric chromosomes have a centromere located closer to one end of the chromosome.
null	null	null	null	null	null	null	Some animals show same behaviour.
null	null	null	null	null	null	null	The number of extant species known is about 700.
MCAS_2007_8_5184	Which of the following best describes a role of mushrooms in ecosystems?	{ "label": [ "A", "B", "C", "D" ], "text": [ "capturing energy from sunlight", "consuming living plant material", "taking energy from animal hosts", "breaking down dead plant material" ] }	D	Question: Which of the following best describes a role of mushrooms in ecosystems? (A) capturing energy from sunlight (B) consuming living plant material (C) taking energy from animal hosts (D) breaking down dead plant material	Answer: (D) breaking down dead plant material	Answer: (A) capturing energy from sunlight	Question: Which of the following best describes a role of mushrooms in ecosystems? (A) capturing energy from sunlight (B) consuming living plant material (C) taking energy from animal hosts (D) breaking down dead plant material Answer: (D) breaking down dead plant material
null	null	null	null	null	null	null	More recent studies have shown that plant diversity and associated changes in plant species composition also affect ecosystem processes governed by higher trophic levels, such as decomposition and herbivory [7] – [10] .
MCAS_2008_8_5706	New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet?	{ "label": [ "A", "B", "C", "D" ], "text": [ "millimeters", "centimeters", "meters", "kilometers" ] }	B	Question: New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet? (A) millimeters (B) centimeters (C) meters (D) kilometers	Answer: (B) centimeters	Answer: (A) millimeters	Question: New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet? (A) millimeters (B) centimeters (C) meters (D) kilometers Answer: (B) centimeters
null	null	null	null	null	null	null	Question: Who insisted on the baby? (A) He (B) They (C) She (D) It Answer: (C) She
Mercury_182385	In which process is nitrogen from the air put into a form that plants can use?	{ "label": [ "A", "B", "C", "D" ], "text": [ "nitrification", "denitrification", "nitrogen saturation", "nitrogen fixation" ] }	D	Question: In which process is nitrogen from the air put into a form that plants can use? (A) nitrification (B) denitrification (C) nitrogen saturation (D) nitrogen fixation	Answer: (D) nitrogen fixation	Answer: (A) nitrification	Question: In which process is nitrogen from the air put into a form that plants can use? (A) nitrification (B) denitrification (C) nitrogen saturation (D) nitrogen fixation Answer: (D) nitrogen fixation
null	null	null	null	null	null	null	Photosynthesis maintains the level of oxygen in the atmosphere and provides energy to all life forms—either directly (for the plants themselves) or indirectly (as the food source for organisms that consume the plants, and, ultimately the organisms that consume them).
null	null	null	null	null	null	null	Question: According to the second-century Apologists, how does God create? (A) out of pre-existent matter (B) out of nothing (C) out of Neo-Platonism (D) out of formless matter Answer: (B) out of nothing
null	null	null	null	null	null	null	Males average a slightly larger body size than females (Terres 1980).
null	null	null	null	null	null	null	They should meet people and other pets.
Mercury_7032655	An element with which property would be best to use in electrical wiring?	{ "label": [ "A", "B", "C", "D" ], "text": [ "insulator", "conductor", "malleable", "porous" ] }	B	Question: An element with which property would be best to use in electrical wiring? (A) insulator (B) conductor (C) malleable (D) porous	Answer: (B) conductor	Answer: (A) insulator	Question: An element with which property would be best to use in electrical wiring? (A) insulator (B) conductor (C) malleable (D) porous Answer: (B) conductor
null	null	null	null	null	null	null	– During cell division, each daughter cell receives one set of chromosomes.
null	null	null	null	null	null	null	Some raw materials need for growth.
MDSA_2007_5_20	The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun?	{ "label": [ "A", "B", "C", "D" ], "text": [ "the days in a year", "the hours in a day", "the changes in the atmosphere of Earth", "the position of the constellations in space" ] }	A	Question: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun? (A) the days in a year (B) the hours in a day (C) the changes in the atmosphere of Earth (D) the position of the constellations in space	Answer: (A) the days in a year	Answer: (B) the hours in a day	Question: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun? (A) the days in a year (B) the hours in a day (C) the changes in the atmosphere of Earth (D) the position of the constellations in space Answer: (A) the days in a year
VASoL_2011_5_26	Pumice is formed when lava from a volcano cools. Which rock type is pumice?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Gaseous rock", "Igneous rock", "Sedimentary rock", "Metamorphic rock" ] }	B	Question: Pumice is formed when lava from a volcano cools. Which rock type is pumice? (A) Gaseous rock (B) Igneous rock (C) Sedimentary rock (D) Metamorphic rock	Answer: (B) Igneous rock	Answer: (C) Sedimentary rock	Question: Pumice is formed when lava from a volcano cools. Which rock type is pumice? (A) Gaseous rock (B) Igneous rock (C) Sedimentary rock (D) Metamorphic rock Answer: (B) Igneous rock
null	null	null	null	null	null	null	multcielluar organisms cells with a nucleus, with cell membranes but lacking cell walls
MCAS_2012_5_23630	In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time?	{ "label": [ "A", "B", "C", "D" ], "text": [ "increase in humidity", "decrease in temperature", "clouds forming in the sky", "winds blowing in the night" ] }	B	Question: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time? (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night	Answer: (B) decrease in temperature	Answer: (C) clouds forming in the sky	Question: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time? (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night Answer: (B) decrease in temperature
null	null	null	null	null	null	null	survival of the fittest--is not the real driving force behind natural selection--but the reproductive advantage that accrues to those individuals possessing traits that are best suited to the environment
Mercury_7014578	Which tool should be used to compare the growth of an algal colony growing in a petri dish?	{ "label": [ "A", "B", "C", "D" ], "text": [ "a scale", "a ruler", "a hand lens", "a balance scale" ] }	C	Question: Which tool should be used to compare the growth of an algal colony growing in a petri dish? (A) a scale (B) a ruler (C) a hand lens (D) a balance scale	Answer: (C) a hand lens	Answer: (D) a balance scale	Question: Which tool should be used to compare the growth of an algal colony growing in a petri dish? (A) a scale (B) a ruler (C) a hand lens (D) a balance scale Answer: (C) a hand lens
null	null	null	null	null	null	null	However, an additional issue in recent investigations using microsatellites is that kin-associated shoaling may have been confounded with spatial genetic structure within a population ( Pouyaud et al., 1999 ).
VASoL_2010_5_24	Which of these is a way the people of Virginia can help restore a natural ecosystem?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Burn their trash", "Plant native plants", "Feed leftover meals to deer", "Drain automobile oil into the grass" ] }	B	Question: Which of these is a way the people of Virginia can help restore a natural ecosystem? (A) Burn their trash (B) Plant native plants (C) Feed leftover meals to deer (D) Drain automobile oil into the grass	Answer: (B) Plant native plants	Answer: (D) Drain automobile oil into the grass	Question: Which of these is a way the people of Virginia can help restore a natural ecosystem? (A) Burn their trash (B) Plant native plants (C) Feed leftover meals to deer (D) Drain automobile oil into the grass Answer: (B) Plant native plants
null	null	null	null	null	null	null	Once mature, the female begins to lay eggs within a gall.
null	null	null	null	null	null	null	Question: What are parents tend not to emphasize as much as walking and talking in children's milestones? (A) crawling and smiling (B) potty training and reading (C) eating and sleeping (D) running and jumping Answer: (C) eating and sleeping
MCAS_2013_5_29394	During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Stir the mixture into hot water to dissolve the sand.", "Strain the mixture through a paper filter to collect the sand.", "Drag a magnet through the mixture to attract the iron filings.", "Shake the mixture to cause the iron filings to settle to the bottom." ] }	C	Question: During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand? (A) Stir the mixture into hot water to dissolve the sand. (B) Strain the mixture through a paper filter to collect the sand. (C) Drag a magnet through the mixture to attract the iron filings. (D) Shake the mixture to cause the iron filings to settle to the bottom.	Answer: (C) Drag a magnet through the mixture to attract the iron filings.	Answer: (A) Stir the mixture into hot water to dissolve the sand.	Question: During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand? (A) Stir the mixture into hot water to dissolve the sand. (B) Strain the mixture through a paper filter to collect the sand. (C) Drag a magnet through the mixture to attract the iron filings. (D) Shake the mixture to cause the iron filings to settle to the bottom. Answer: (C) Drag a magnet through the mixture to attract the iron filings.
NYSEDREGENTS_2009_4_14	Which physical structure would best help a bear to survive a winter in New York State?	{ "label": [ "A", "B", "C", "D" ], "text": [ "big ears", "black nose", "thick fur", "brown eyes" ] }	C	Question: Which physical structure would best help a bear to survive a winter in New York State? (A) big ears (B) black nose (C) thick fur (D) brown eyes	Answer: (C) thick fur	Answer: (D) brown eyes	Question: Which physical structure would best help a bear to survive a winter in New York State? (A) big ears (B) black nose (C) thick fur (D) brown eyes Answer: (C) thick fur
null	null	null	null	null	null	null	This makes nitrogen a crucial part of food production.
null	null	null	null	null	null	null	Question: What appears to go around the earth? (A) Moon (B) Sun (C) Stars (D) Planets Answer: (B) Sun
MDSA_2011_4_40	A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm?	{ "label": [ "A", "B", "C", "D" ], "text": [ "The stirring action heated the spoon.", "Warm air in the room heated the spoon.", "Heat from the soup was transferred to the spoon.", "The student's hand transferred heat to the spoon." ] }	C	Question: A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm? (A) The stirring action heated the spoon. (B) Warm air in the room heated the spoon. (C) Heat from the soup was transferred to the spoon. (D) The student's hand transferred heat to the spoon.	Answer: (C) Heat from the soup was transferred to the spoon.	Answer: (A) The stirring action heated the spoon.	Question: A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm? (A) The stirring action heated the spoon. (B) Warm air in the room heated the spoon. (C) Heat from the soup was transferred to the spoon. (D) The student's hand transferred heat to the spoon. Answer: (C) Heat from the soup was transferred to the spoon.
null	null	null	null	null	null	null	Vegetative or asexual reproduction produces new shoots without the benefit of male (pollen) and female (ovary) contact (i.e. sexual reproduction).
NYSEDREGENTS_2011_4_26	What is the main source of energy for the water cycle?	{ "label": [ "A", "B", "C", "D" ], "text": [ "electricity", "erosion", "gravity", "sunlight" ] }	D	Question: What is the main source of energy for the water cycle? (A) electricity (B) erosion (C) gravity (D) sunlight	Answer: (D) sunlight	Answer: (A) electricity	Question: What is the main source of energy for the water cycle? (A) electricity (B) erosion (C) gravity (D) sunlight Answer: (D) sunlight
null	null	null	null	null	null	null	Gulls need food too.
Mercury_SC_400189	Which of these resources is renewable?	{ "label": [ "A", "B", "C", "D" ], "text": [ "natural gas", "oil", "coal", "wind" ] }	D	Question: Which of these resources is renewable? (A) natural gas (B) oil (C) coal (D) wind	Answer: (D) wind	Answer: (B) oil	Question: Which of these resources is renewable? (A) natural gas (B) oil (C) coal (D) wind Answer: (D) wind
null	null	null	null	null	null	null	Most soy food contains dietary fiber.
MDSA_2007_5_38	Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment?	{ "label": [ "A", "B", "C", "D" ], "text": [ "burning it", "recycling it", "burying it in landfills", "crushing it before throwing it away" ] }	B	Question: Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment? (A) burning it (B) recycling it (C) burying it in landfills (D) crushing it before throwing it away	Answer: (B) recycling it	Answer: (A) burning it	Question: Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment? (A) burning it (B) recycling it (C) burying it in landfills (D) crushing it before throwing it away Answer: (B) recycling it
null	null	null	null	null	null	null	Question: What are the three modes by which heat can be transferred? (A) insulation, reflection, conduction (B) expansion, conduction, reflection (C) conduction, convection, radiation (D) radiation, conduction, expansion Answer: (C) conduction, convection, radiation
null	null	null	null	null	null	null	Most fields produce effects.
null	null	null	null	null	null	null	Some companions feel families.
null	null	null	null	null	null	null	Some grandparents need education.
Mercury_SC_415012	Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?	{ "label": [ "A", "B", "C", "D" ], "text": [ "a mountain eroding to a hill", "a river making a delta", "a glacier making a canyon", "a storm moving a sandbar" ] }	D	Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly? (A) a mountain eroding to a hill (B) a river making a delta (C) a glacier making a canyon (D) a storm moving a sandbar	Answer: (D) a storm moving a sandbar	Answer: (B) a river making a delta	Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly? (A) a mountain eroding to a hill (B) a river making a delta (C) a glacier making a canyon (D) a storm moving a sandbar Answer: (D) a storm moving a sandbar
Mercury_SC_406795	Which items would best protect a group of students while investigating a forest ecosystem?	{ "label": [ "A", "B", "C", "D" ], "text": [ "short pants and T-shirts", "short pants and long-sleeved shirts", "long pants and T-shirts", "long pants and long-sleeved shirts" ] }	D	Question: Which items would best protect a group of students while investigating a forest ecosystem? (A) short pants and T-shirts (B) short pants and long-sleeved shirts (C) long pants and T-shirts (D) long pants and long-sleeved shirts	Answer: (D) long pants and long-sleeved shirts	Answer: (C) long pants and T-shirts	Question: Which items would best protect a group of students while investigating a forest ecosystem? (A) short pants and T-shirts (B) short pants and long-sleeved shirts (C) long pants and T-shirts (D) long pants and long-sleeved shirts Answer: (D) long pants and long-sleeved shirts
null	null	null	null	null	null	null	Earth can be divided into biomes with similar climates and organisms.
null	null	null	null	null	null	null	The female reproductive tract is divided into several parts.
null	null	null	null	null	null	null	The energy is still around, but divided up in different places.
Mercury_7144848	Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation?	{ "label": [ "A", "B", "C", "D" ], "text": [ "to test a hypothesis", "to form a theory", "to produce a scientific paper", "to change previous results" ] }	A	Question: Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation? (A) to test a hypothesis (B) to form a theory (C) to produce a scientific paper (D) to change previous results	Answer: (A) to test a hypothesis	Answer: (D) to change previous results	Question: Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation? (A) to test a hypothesis (B) to form a theory (C) to produce a scientific paper (D) to change previous results Answer: (A) to test a hypothesis
null	null	null	null	null	null	null	The evolutionary tendency of plants has been, firstly, to migrate from water to land ; and secondly, to make the modifications necessitated by the change from an aquatic to a terrestrial habitat.
Mercury_7263708	Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere?	{ "label": [ "A", "B", "C", "D" ], "text": [ "auroras", "tornadoes", "rainbows", "inversions" ] }	A	Question: Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere? (A) auroras (B) tornadoes (C) rainbows (D) inversions	Answer: (A) auroras	Answer: (D) inversions	Question: Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere? (A) auroras (B) tornadoes (C) rainbows (D) inversions Answer: (A) auroras
Mercury_7013773	What takes place as a light wave enters a denser medium?	{ "label": [ "A", "B", "C", "D" ], "text": [ "it is reflected", "it is absorbed", "it is refracted", "it is compressed" ] }	C	Question: What takes place as a light wave enters a denser medium? (A) it is reflected (B) it is absorbed (C) it is refracted (D) it is compressed	Answer: (C) it is refracted	Answer: (A) it is reflected	Question: What takes place as a light wave enters a denser medium? (A) it is reflected (B) it is absorbed (C) it is refracted (D) it is compressed Answer: (C) it is refracted
null	null	null	null	null	null	null	They feed on termites and ants, either at night or during the day.
Mercury_7068618	Which renewable resource is used with photovoltaic cells to produce electricity?	{ "label": [ "A", "B", "C", "D" ], "text": [ "hydrothermal energy", "solar energy", "geothermal energy", "nuclear energy" ] }	B	Question: Which renewable resource is used with photovoltaic cells to produce electricity? (A) hydrothermal energy (B) solar energy (C) geothermal energy (D) nuclear energy	Answer: (B) solar energy	Answer: (C) geothermal energy	Question: Which renewable resource is used with photovoltaic cells to produce electricity? (A) hydrothermal energy (B) solar energy (C) geothermal energy (D) nuclear energy Answer: (B) solar energy
null	null	null	null	null	null	null	Some radiation exhibits high thermal conductivity.
null	null	null	null	null	null	null	Question: What are Titans not supposed to have? (A) hair (B) genitals (C) wings (D) fins Answer: (B) genitals
MCAS_2004_8_29	About how many Earth days does it take the Moon to travel around Earth?	{ "label": [ "A", "B", "C", "D" ], "text": [ "1", "27", "180", "365" ] }	B	Question: About how many Earth days does it take the Moon to travel around Earth? (A) 1 (B) 27 (C) 180 (D) 365	Answer: (B) 27	Answer: (A) 1	Question: About how many Earth days does it take the Moon to travel around Earth? (A) 1 (B) 27 (C) 180 (D) 365 Answer: (B) 27
null	null	null	null	null	null	null	With respect to what is preserved, there are several types of fossils.
null	null	null	null	null	null	null	They eat leaves, dead plant materials, fungi, and animal droppings.
TIMSS_1995_8_O12	Air is made up of many gases. Which gas is found in the greatest amount?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Nitrogen", "Oxygen", "Carbon dioxide", "Hydrogen" ] }	A	Question: Air is made up of many gases. Which gas is found in the greatest amount? (A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen	Answer: (A) Nitrogen	Answer: (C) Carbon dioxide	Question: Air is made up of many gases. Which gas is found in the greatest amount? (A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen Answer: (A) Nitrogen
TIMSS_2003_8_pg26	A powder made up of both white specks and black specks is likely to be	{ "label": [ "A", "B", "C", "D" ], "text": [ "a solution", "a pure compound", "a mixture", "an element" ] }	C	Question: A powder made up of both white specks and black specks is likely to be (A) a solution (B) a pure compound (C) a mixture (D) an element	Answer: (C) a mixture	Answer: (A) a solution	Question: A powder made up of both white specks and black specks is likely to be (A) a solution (B) a pure compound (C) a mixture (D) an element Answer: (C) a mixture
null	null	null	null	null	null	null	When a new environment becomes available, a succession of living things may colonise the area.
Mercury_SC_408557	Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture?	{ "label": [ "A", "B", "C", "D" ], "text": [ "Both substances mix evenly.", "Both substances can evaporate.", "One substance dissolves into another.", "One substance can be separated from the other." ] }	D	Question: Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture? (A) Both substances mix evenly. (B) Both substances can evaporate. (C) One substance dissolves into another. (D) One substance can be separated from the other.	Answer: (D) One substance can be separated from the other.	Answer: (C) One substance dissolves into another.	Question: Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture? (A) Both substances mix evenly. (B) Both substances can evaporate. (C) One substance dissolves into another. (D) One substance can be separated from the other. Answer: (D) One substance can be separated from the other.
null	null	null	null	null	null	null	Some experts consider tolerance tests.
NYSEDREGENTS_2005_8_32	Evidence that living things have evolved over hundreds of millions of years can be found in	{ "label": [ "1", "2", "3", "4" ], "text": [ "particles in the air", "rocks containing fossils", "tree rings from recently logged trees", "chemicals in human hair" ] }	2	Question: Evidence that living things have evolved over hundreds of millions of years can be found in (1) particles in the air (2) rocks containing fossils (3) tree rings from recently logged trees (4) chemicals in human hair	Answer: (2) rocks containing fossils	Answer: (3) tree rings from recently logged trees	Question: Evidence that living things have evolved over hundreds of millions of years can be found in (1) particles in the air (2) rocks containing fossils (3) tree rings from recently logged trees (4) chemicals in human hair Answer: (2) rocks containing fossils
null	null	null	null	null	null	null	The term growth involves two distinct ideas which are not always carefulfy dis- tinguished.
Mercury_7172410	The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?	{ "label": [ "A", "B", "C", "D" ], "text": [ "deposition", "weathering", "precipitation", "photosynthesis" ] }	B	Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process? (A) deposition (B) weathering (C) precipitation (D) photosynthesis	Answer: (B) weathering	Answer: (D) photosynthesis	Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process? (A) deposition (B) weathering (C) precipitation (D) photosynthesis Answer: (B) weathering
null	null	null	null	null	null	null	Some air carries diseases.

Mercury_7043838

What is the main source of energy that drives all weather patterns?

{ "label": [ "A", "B", "C", "D" ], "text": [ "the Sun", "oceans", "the Moon", "mountains" ] }

A

Question: What is the main source of energy that drives all weather patterns? (A) the Sun (B) oceans (C) the Moon (D) mountains

Answer: (A) the Sun

Answer: (B) oceans

Question: What is the main source of energy that drives all weather patterns? (A) the Sun (B) oceans (C) the Moon (D) mountains Answer: (A) the Sun

Mercury_7001838

Which property of an element is determined by adding the number of protons and number of neutrons?

{ "label": [ "A", "B", "C", "D" ], "text": [ "atomic mass", "atomic radius", "electrical charge", "electrical potential" ] }

A

Question: Which property of an element is determined by adding the number of protons and number of neutrons? (A) atomic mass (B) atomic radius (C) electrical charge (D) electrical potential

Answer: (A) atomic mass

Answer: (C) electrical charge

Question: Which property of an element is determined by adding the number of protons and number of neutrons? (A) atomic mass (B) atomic radius (C) electrical charge (D) electrical potential Answer: (A) atomic mass

ACTAAP_2013_5_15

Compared to other stars in our galaxy, which is the best description of our Sun?

{ "label": [ "A", "B", "C", "D" ], "text": [ "larger size, higher temperature", "smaller size, higher temperature", "larger size, average temperature", "average size, average temperature" ] }

D

Question: Compared to other stars in our galaxy, which is the best description of our Sun? (A) larger size, higher temperature (B) smaller size, higher temperature (C) larger size, average temperature (D) average size, average temperature

Answer: (D) average size, average temperature

Answer: (B) smaller size, higher temperature

Question: Compared to other stars in our galaxy, which is the best description of our Sun? (A) larger size, higher temperature (B) smaller size, higher temperature (C) larger size, average temperature (D) average size, average temperature Answer: (D) average size, average temperature

null

Some dandelions have health benefits.

MCAS_2001_8_7

When igneous rock is changed into metamorphic rock, which form of energy is this process?

{ "label": [ "A", "B", "C", "D" ], "text": [ "heat", "chemical", "magnetic", "light" ] }

A

Question: When igneous rock is changed into metamorphic rock, which form of energy is this process? (A) heat (B) chemical (C) magnetic (D) light

Answer: (A) heat

Answer: (D) light

Question: When igneous rock is changed into metamorphic rock, which form of energy is this process? (A) heat (B) chemical (C) magnetic (D) light Answer: (A) heat

null

Most electric charge uses energy.

null

Cell type-specific rescue experiments indicate that the regulation of roaming and dwelling is distributed among multiple sensory neurons.

null

Some mothers share patterns.

MCAS_2007_8_5186

Which of the following is a characteristic of all chemical changes?

{ "label": [ "A", "B", "C", "D" ], "text": [ "A different state of matter is produced.", "Some mass is converted to energy.", "Some form of light is given off.", "A new material is formed." ] }

D

Question: Which of the following is a characteristic of all chemical changes? (A) A different state of matter is produced. (B) Some mass is converted to energy. (C) Some form of light is given off. (D) A new material is formed.

Answer: (D) A new material is formed.

Answer: (A) A different state of matter is produced.

Question: Which of the following is a characteristic of all chemical changes? (A) A different state of matter is produced. (B) Some mass is converted to energy. (C) Some form of light is given off. (D) A new material is formed. Answer: (D) A new material is formed.

Mercury_SC_408364

Tim and Carla play catch with a ball. Which term describes the motion of a ball?

{ "label": [ "A", "B", "C", "D" ], "text": [ "shape", "size", "speed", "weight" ] }

C

Question: Tim and Carla play catch with a ball. Which term describes the motion of a ball? (A) shape (B) size (C) speed (D) weight

Answer: (C) speed

Answer: (D) weight

Question: Tim and Carla play catch with a ball. Which term describes the motion of a ball? (A) shape (B) size (C) speed (D) weight Answer: (C) speed

null

They pick insects off of foliage

null

Though these two populations spend a period of the year in the same place, and though there was evidence of gene flow between them, the difference in prey–habitat specialization has been sufficient to maintain genetic and even coloration divergence.

Mercury_7168840

A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next?

{ "label": [ "A", "B", "C", "D" ], "text": [ "The organisms built up a resistance to the mercury.", "The mercury passed through the food chain.", "The plankton made the mercury safe.", "The fish would not eat the plankton." ] }

B

Question: A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next? (A) The organisms built up a resistance to the mercury. (B) The mercury passed through the food chain. (C) The plankton made the mercury safe. (D) The fish would not eat the plankton.

Answer: (B) The mercury passed through the food chain.

Answer: (A) The organisms built up a resistance to the mercury.

Question: A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next? (A) The organisms built up a resistance to the mercury. (B) The mercury passed through the food chain. (C) The plankton made the mercury safe. (D) The fish would not eat the plankton. Answer: (B) The mercury passed through the food chain.

Mercury_7024920

In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Sinks are empty.", "Glassware is clean.", "Eye protection is worn.", "Electrical equipment is off." ] }

C

Question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow? (A) Sinks are empty. (B) Glassware is clean. (C) Eye protection is worn. (D) Electrical equipment is off.

Answer: (C) Eye protection is worn.

Answer: (A) Sinks are empty.

Question: In the lab, students are working with substances that could cause burns. Which of these safety precautions is most important to follow? (A) Sinks are empty. (B) Glassware is clean. (C) Eye protection is worn. (D) Electrical equipment is off. Answer: (C) Eye protection is worn.

null

If this happens, natural selection may favor individuals with the adaptive mutation.

AIMS_2009_4_6

Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Metal doesn't get hot and melt when you plug it into the outlet.", "Metal is strong and is less likely to break when you plug it into the outlet.", "Metal is an insulator and prevents shocks when you plug it into the outlet.", "Metal is a conductor and completes a circuit when you plug it into the outlet." ] }

D

Question: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal? (A) Metal doesn't get hot and melt when you plug it into the outlet. (B) Metal is strong and is less likely to break when you plug it into the outlet. (C) Metal is an insulator and prevents shocks when you plug it into the outlet. (D) Metal is a conductor and completes a circuit when you plug it into the outlet.

Answer: (D) Metal is a conductor and completes a circuit when you plug it into the outlet.

Answer: (C) Metal is an insulator and prevents shocks when you plug it into the outlet.

Question: Alex looked at an electric toothbrush that had a plug with three metal prongs. Why are these prongs made out of metal? (A) Metal doesn't get hot and melt when you plug it into the outlet. (B) Metal is strong and is less likely to break when you plug it into the outlet. (C) Metal is an insulator and prevents shocks when you plug it into the outlet. (D) Metal is a conductor and completes a circuit when you plug it into the outlet. Answer: (D) Metal is a conductor and completes a circuit when you plug it into the outlet.

Mercury_7213185

Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Pacific Ocean", "Colorado River", "Sierra Nevada Mountains", "Columbia River Basin" ] }

C

Question: Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain? (A) Pacific Ocean (B) Colorado River (C) Sierra Nevada Mountains (D) Columbia River Basin

Answer: (C) Sierra Nevada Mountains

Answer: (A) Pacific Ocean

Question: Which of these geographic features most directly influences the climate of Nevada by limiting the amount of water vapor that can reach the state and fall as rain? (A) Pacific Ocean (B) Colorado River (C) Sierra Nevada Mountains (D) Columbia River Basin Answer: (C) Sierra Nevada Mountains

MCAS_2008_5_5635

Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile?

{ "label": [ "A", "B", "C", "D" ], "text": [ "The bacteria break down water into food.", "The bacteria change sunlight into minerals.", "The bacteria combine with sand to form rocks.", "The bacteria break down plant and animal matter." ] }

D

Question: Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile? (A) The bacteria break down water into food. (B) The bacteria change sunlight into minerals. (C) The bacteria combine with sand to form rocks. (D) The bacteria break down plant and animal matter.

Answer: (D) The bacteria break down plant and animal matter.

Answer: (B) The bacteria change sunlight into minerals.

Question: Many bacteria are decomposer organisms. Which of the following statements best describes how these bacteria help make soil more fertile? (A) The bacteria break down water into food. (B) The bacteria change sunlight into minerals. (C) The bacteria combine with sand to form rocks. (D) The bacteria break down plant and animal matter. Answer: (D) The bacteria break down plant and animal matter.

Mercury_7081795

Which is a major organ of the nervous system?

{ "label": [ "A", "B", "C", "D" ], "text": [ "brain", "stomach", "lung", "bone" ] }

A

Question: Which is a major organ of the nervous system? (A) brain (B) stomach (C) lung (D) bone

Answer: (A) brain

Answer: (B) stomach

Question: Which is a major organ of the nervous system? (A) brain (B) stomach (C) lung (D) bone Answer: (A) brain

Mercury_SC_400326

Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate?

{ "label": [ "A", "B", "C", "D" ], "text": [ "dark moths in any environment", "light moths in any environment", "dark moths in a light environment", "light moths in a light environment" ] }

D

Question: Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate? (A) dark moths in any environment (B) light moths in any environment (C) dark moths in a light environment (D) light moths in a light environment

Answer: (D) light moths in a light environment

Answer: (C) dark moths in a light environment

Question: Birds eat non-camouflaged moths at a higher rate than they eat camouflaged moths. In which situation would birds eat the moths at the slowest rate? (A) dark moths in any environment (B) light moths in any environment (C) dark moths in a light environment (D) light moths in a light environment Answer: (D) light moths in a light environment

null

Strong teeth are found in those fishes which feed on crabs or sea urchins.

null

Question: What did John and the speaker develop over the years? (A) language (B) sign (C) code (D) symbol Answer: (B) sign

null

Some of these limestone rocks become exposed above the sea.

null

The classification of all organisms based on shared characteristics; changes as new discoveries are made.

null

Most live arthropods have heads.

Mercury_406774

Organisms that reproduce asexually generally have offspring that are

{ "label": [ "A", "B", "C", "D" ], "text": [ "unicellular.", "multicellular.", "genetically varied.", "genetically identical." ] }

D

Question: Organisms that reproduce asexually generally have offspring that are (A) unicellular. (B) multicellular. (C) genetically varied. (D) genetically identical.

Answer: (D) genetically identical.

Answer: (C) genetically varied.

Question: Organisms that reproduce asexually generally have offspring that are (A) unicellular. (B) multicellular. (C) genetically varied. (D) genetically identical. Answer: (D) genetically identical.

null

DNA crosses over and nonsister chromatids break and rejoin to the others DNA, there is also a movement of centrosomes, breaksown of the nuclear envelope and dispersal of nucleoli.

null

Geographicdistribution of the three major amphibian taxa differs.

null

Some human activities have direct impact.

MCAS_2015_5_4

Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Decomposition adds silt to soil.", "Decomposition adds water to soil.", "Decomposition adds oxygen to soil.", "Decomposition adds nutrients to soil." ] }

D

Question: Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils? (A) Decomposition adds silt to soil. (B) Decomposition adds water to soil. (C) Decomposition adds oxygen to soil. (D) Decomposition adds nutrients to soil.

Answer: (D) Decomposition adds nutrients to soil.

Answer: (B) Decomposition adds water to soil.

Question: Which of the following statements best explains how the decomposition of plant and animal matter helps to form rich soils? (A) Decomposition adds silt to soil. (B) Decomposition adds water to soil. (C) Decomposition adds oxygen to soil. (D) Decomposition adds nutrients to soil. Answer: (D) Decomposition adds nutrients to soil.

null

Their mainly vegetarian diet is supplemented with insects, grubs, eggs, baby birds, and sometimes rodents and hares.

Mercury_7130795

When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision?

{ "label": [ "A", "B", "C", "D" ], "text": [ "electrical", "electromagnetic", "magnetic", "sound" ] }

D

Question: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision? (A) electrical (B) electromagnetic (C) magnetic (D) sound

Answer: (D) sound

Answer: (A) electrical

Question: When two bumper cars collide, some of the kinetic energy of the cars is transformed. Which form of energy is most likely formed as a result of this collision? (A) electrical (B) electromagnetic (C) magnetic (D) sound Answer: (D) sound

null

Some mechanisms have experimental evidence.

null

most of Earth is covered by water;

null

There are around 12 000 types of ferns that differ in size, morphology and type of habitat.

null

T or F: Metacentric chromosomes have a centromere located closer to one end of the chromosome.

null

Some animals show same behaviour.

null

The number of extant species known is about 700.

MCAS_2007_8_5184

Which of the following best describes a role of mushrooms in ecosystems?

{ "label": [ "A", "B", "C", "D" ], "text": [ "capturing energy from sunlight", "consuming living plant material", "taking energy from animal hosts", "breaking down dead plant material" ] }

D

Question: Which of the following best describes a role of mushrooms in ecosystems? (A) capturing energy from sunlight (B) consuming living plant material (C) taking energy from animal hosts (D) breaking down dead plant material

Answer: (D) breaking down dead plant material

Answer: (A) capturing energy from sunlight

Question: Which of the following best describes a role of mushrooms in ecosystems? (A) capturing energy from sunlight (B) consuming living plant material (C) taking energy from animal hosts (D) breaking down dead plant material Answer: (D) breaking down dead plant material

null

More recent studies have shown that plant diversity and associated changes in plant species composition also affect ecosystem processes governed by higher trophic levels, such as decomposition and herbivory [7] – [10] .

MCAS_2008_8_5706

New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet?

{ "label": [ "A", "B", "C", "D" ], "text": [ "millimeters", "centimeters", "meters", "kilometers" ] }

B

Question: New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet? (A) millimeters (B) centimeters (C) meters (D) kilometers

Answer: (B) centimeters

Answer: (A) millimeters

Question: New carpet is being measured for a room that is 5.5 m by 4.6 m. On a measuring tape, what is the smallest unit that is necessary to measure the room accurately for the carpet? (A) millimeters (B) centimeters (C) meters (D) kilometers Answer: (B) centimeters

null

Question: Who insisted on the baby? (A) He (B) They (C) She (D) It Answer: (C) She

Mercury_182385

In which process is nitrogen from the air put into a form that plants can use?

{ "label": [ "A", "B", "C", "D" ], "text": [ "nitrification", "denitrification", "nitrogen saturation", "nitrogen fixation" ] }

D

Question: In which process is nitrogen from the air put into a form that plants can use? (A) nitrification (B) denitrification (C) nitrogen saturation (D) nitrogen fixation

Answer: (D) nitrogen fixation

Answer: (A) nitrification

Question: In which process is nitrogen from the air put into a form that plants can use? (A) nitrification (B) denitrification (C) nitrogen saturation (D) nitrogen fixation Answer: (D) nitrogen fixation

null

Photosynthesis maintains the level of oxygen in the atmosphere and provides energy to all life forms—either directly (for the plants themselves) or indirectly (as the food source for organisms that consume the plants, and, ultimately the organisms that consume them).

null

Question: According to the second-century Apologists, how does God create? (A) out of pre-existent matter (B) out of nothing (C) out of Neo-Platonism (D) out of formless matter Answer: (B) out of nothing

null

Males average a slightly larger body size than females (Terres 1980).

null

They should meet people and other pets.

Mercury_7032655

An element with which property would be best to use in electrical wiring?

{ "label": [ "A", "B", "C", "D" ], "text": [ "insulator", "conductor", "malleable", "porous" ] }

B

Question: An element with which property would be best to use in electrical wiring? (A) insulator (B) conductor (C) malleable (D) porous

Answer: (B) conductor

Answer: (A) insulator

Question: An element with which property would be best to use in electrical wiring? (A) insulator (B) conductor (C) malleable (D) porous Answer: (B) conductor

null

– During cell division, each daughter cell receives one set of chromosomes.

null

Some raw materials need for growth.

MDSA_2007_5_20

The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun?

{ "label": [ "A", "B", "C", "D" ], "text": [ "the days in a year", "the hours in a day", "the changes in the atmosphere of Earth", "the position of the constellations in space" ] }

A

Question: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun? (A) the days in a year (B) the hours in a day (C) the changes in the atmosphere of Earth (D) the position of the constellations in space

Answer: (A) the days in a year

Answer: (B) the hours in a day

Question: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun? (A) the days in a year (B) the hours in a day (C) the changes in the atmosphere of Earth (D) the position of the constellations in space Answer: (A) the days in a year

VASoL_2011_5_26

Pumice is formed when lava from a volcano cools. Which rock type is pumice?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Gaseous rock", "Igneous rock", "Sedimentary rock", "Metamorphic rock" ] }

B

Question: Pumice is formed when lava from a volcano cools. Which rock type is pumice? (A) Gaseous rock (B) Igneous rock (C) Sedimentary rock (D) Metamorphic rock

Answer: (B) Igneous rock

Answer: (C) Sedimentary rock

Question: Pumice is formed when lava from a volcano cools. Which rock type is pumice? (A) Gaseous rock (B) Igneous rock (C) Sedimentary rock (D) Metamorphic rock Answer: (B) Igneous rock

null

multcielluar organisms cells with a nucleus, with cell membranes but lacking cell walls

MCAS_2012_5_23630

In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time?

{ "label": [ "A", "B", "C", "D" ], "text": [ "increase in humidity", "decrease in temperature", "clouds forming in the sky", "winds blowing in the night" ] }

B

Question: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time? (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night

Answer: (B) decrease in temperature

Answer: (C) clouds forming in the sky

Question: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time? (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night Answer: (B) decrease in temperature

null

survival of the fittest--is not the real driving force behind natural selection--but the reproductive advantage that accrues to those individuals possessing traits that are best suited to the environment

Mercury_7014578

Which tool should be used to compare the growth of an algal colony growing in a petri dish?

{ "label": [ "A", "B", "C", "D" ], "text": [ "a scale", "a ruler", "a hand lens", "a balance scale" ] }

C

Question: Which tool should be used to compare the growth of an algal colony growing in a petri dish? (A) a scale (B) a ruler (C) a hand lens (D) a balance scale

Answer: (C) a hand lens

Answer: (D) a balance scale

Question: Which tool should be used to compare the growth of an algal colony growing in a petri dish? (A) a scale (B) a ruler (C) a hand lens (D) a balance scale Answer: (C) a hand lens

null

However, an additional issue in recent investigations using microsatellites is that kin-associated shoaling may have been confounded with spatial genetic structure within a population ( Pouyaud et al., 1999 ).

VASoL_2010_5_24

Which of these is a way the people of Virginia can help restore a natural ecosystem?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Burn their trash", "Plant native plants", "Feed leftover meals to deer", "Drain automobile oil into the grass" ] }

B

Question: Which of these is a way the people of Virginia can help restore a natural ecosystem? (A) Burn their trash (B) Plant native plants (C) Feed leftover meals to deer (D) Drain automobile oil into the grass

Answer: (B) Plant native plants

Answer: (D) Drain automobile oil into the grass

Question: Which of these is a way the people of Virginia can help restore a natural ecosystem? (A) Burn their trash (B) Plant native plants (C) Feed leftover meals to deer (D) Drain automobile oil into the grass Answer: (B) Plant native plants

null

Once mature, the female begins to lay eggs within a gall.

null

Question: What are parents tend not to emphasize as much as walking and talking in children's milestones? (A) crawling and smiling (B) potty training and reading (C) eating and sleeping (D) running and jumping Answer: (C) eating and sleeping

MCAS_2013_5_29394

During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Stir the mixture into hot water to dissolve the sand.", "Strain the mixture through a paper filter to collect the sand.", "Drag a magnet through the mixture to attract the iron filings.", "Shake the mixture to cause the iron filings to settle to the bottom." ] }

C

Question: During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand? (A) Stir the mixture into hot water to dissolve the sand. (B) Strain the mixture through a paper filter to collect the sand. (C) Drag a magnet through the mixture to attract the iron filings. (D) Shake the mixture to cause the iron filings to settle to the bottom.

Answer: (C) Drag a magnet through the mixture to attract the iron filings.

Answer: (A) Stir the mixture into hot water to dissolve the sand.

Question: During science class, students combined 1 kg of iron filings with 1 kg of sand to create a mixture. Which of the following methods would be best for separating the iron filings from the sand? (A) Stir the mixture into hot water to dissolve the sand. (B) Strain the mixture through a paper filter to collect the sand. (C) Drag a magnet through the mixture to attract the iron filings. (D) Shake the mixture to cause the iron filings to settle to the bottom. Answer: (C) Drag a magnet through the mixture to attract the iron filings.

NYSEDREGENTS_2009_4_14

Which physical structure would best help a bear to survive a winter in New York State?

{ "label": [ "A", "B", "C", "D" ], "text": [ "big ears", "black nose", "thick fur", "brown eyes" ] }

C

Question: Which physical structure would best help a bear to survive a winter in New York State? (A) big ears (B) black nose (C) thick fur (D) brown eyes

Answer: (C) thick fur

Answer: (D) brown eyes

Question: Which physical structure would best help a bear to survive a winter in New York State? (A) big ears (B) black nose (C) thick fur (D) brown eyes Answer: (C) thick fur

null

This makes nitrogen a crucial part of food production.

null

Question: What appears to go around the earth? (A) Moon (B) Sun (C) Stars (D) Planets Answer: (B) Sun

MDSA_2011_4_40

A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm?

{ "label": [ "A", "B", "C", "D" ], "text": [ "The stirring action heated the spoon.", "Warm air in the room heated the spoon.", "Heat from the soup was transferred to the spoon.", "The student's hand transferred heat to the spoon." ] }

C

Question: A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm? (A) The stirring action heated the spoon. (B) Warm air in the room heated the spoon. (C) Heat from the soup was transferred to the spoon. (D) The student's hand transferred heat to the spoon.

Answer: (C) Heat from the soup was transferred to the spoon.

Answer: (A) The stirring action heated the spoon.

Question: A student heated a pan of soup on a stove. While stirring the soup with a metal spoon, the student noticed the spoon became very warm. What is the most likely reason the spoon became warm? (A) The stirring action heated the spoon. (B) Warm air in the room heated the spoon. (C) Heat from the soup was transferred to the spoon. (D) The student's hand transferred heat to the spoon. Answer: (C) Heat from the soup was transferred to the spoon.

null

Vegetative or asexual reproduction produces new shoots without the benefit of male (pollen) and female (ovary) contact (i.e. sexual reproduction).

NYSEDREGENTS_2011_4_26

What is the main source of energy for the water cycle?

{ "label": [ "A", "B", "C", "D" ], "text": [ "electricity", "erosion", "gravity", "sunlight" ] }

D

Question: What is the main source of energy for the water cycle? (A) electricity (B) erosion (C) gravity (D) sunlight

Answer: (D) sunlight

Answer: (A) electricity

Question: What is the main source of energy for the water cycle? (A) electricity (B) erosion (C) gravity (D) sunlight Answer: (D) sunlight

null

Gulls need food too.

Mercury_SC_400189

Which of these resources is renewable?

{ "label": [ "A", "B", "C", "D" ], "text": [ "natural gas", "oil", "coal", "wind" ] }

D

Question: Which of these resources is renewable? (A) natural gas (B) oil (C) coal (D) wind

Answer: (D) wind

Answer: (B) oil

Question: Which of these resources is renewable? (A) natural gas (B) oil (C) coal (D) wind Answer: (D) wind

null

Most soy food contains dietary fiber.

MDSA_2007_5_38

Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment?

{ "label": [ "A", "B", "C", "D" ], "text": [ "burning it", "recycling it", "burying it in landfills", "crushing it before throwing it away" ] }

B

Question: Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment? (A) burning it (B) recycling it (C) burying it in landfills (D) crushing it before throwing it away

Answer: (B) recycling it

Answer: (A) burning it

Question: Students are learning about the natural resources in Maryland. One group of students researches information about renewable natural resources in the state. The other group researches information about nonrenewable natural resources in the state. The resources the students investigate include plants, animals, soil, minerals, water, coal, and oil. Aluminum is a nonrenewable natural resource. Which of these methods of aluminum disposal is best for the environment? (A) burning it (B) recycling it (C) burying it in landfills (D) crushing it before throwing it away Answer: (B) recycling it

null

Question: What are the three modes by which heat can be transferred? (A) insulation, reflection, conduction (B) expansion, conduction, reflection (C) conduction, convection, radiation (D) radiation, conduction, expansion Answer: (C) conduction, convection, radiation

null

Most fields produce effects.

null

Some companions feel families.

null

Some grandparents need education.

Mercury_SC_415012

Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?

{ "label": [ "A", "B", "C", "D" ], "text": [ "a mountain eroding to a hill", "a river making a delta", "a glacier making a canyon", "a storm moving a sandbar" ] }

D

Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly? (A) a mountain eroding to a hill (B) a river making a delta (C) a glacier making a canyon (D) a storm moving a sandbar

Answer: (D) a storm moving a sandbar

Answer: (B) a river making a delta

Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly? (A) a mountain eroding to a hill (B) a river making a delta (C) a glacier making a canyon (D) a storm moving a sandbar Answer: (D) a storm moving a sandbar

Mercury_SC_406795

Which items would best protect a group of students while investigating a forest ecosystem?

{ "label": [ "A", "B", "C", "D" ], "text": [ "short pants and T-shirts", "short pants and long-sleeved shirts", "long pants and T-shirts", "long pants and long-sleeved shirts" ] }

D

Question: Which items would best protect a group of students while investigating a forest ecosystem? (A) short pants and T-shirts (B) short pants and long-sleeved shirts (C) long pants and T-shirts (D) long pants and long-sleeved shirts

Answer: (D) long pants and long-sleeved shirts

Answer: (C) long pants and T-shirts

Question: Which items would best protect a group of students while investigating a forest ecosystem? (A) short pants and T-shirts (B) short pants and long-sleeved shirts (C) long pants and T-shirts (D) long pants and long-sleeved shirts Answer: (D) long pants and long-sleeved shirts

null

Earth can be divided into biomes with similar climates and organisms.

null

The female reproductive tract is divided into several parts.

null

The energy is still around, but divided up in different places.

Mercury_7144848

Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation?

{ "label": [ "A", "B", "C", "D" ], "text": [ "to test a hypothesis", "to form a theory", "to produce a scientific paper", "to change previous results" ] }

A

Question: Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation? (A) to test a hypothesis (B) to form a theory (C) to produce a scientific paper (D) to change previous results

Answer: (A) to test a hypothesis

Answer: (D) to change previous results

Question: Investigations were performed to test several methods of keeping petals from falling off flowers that had been cut. Which is the most likely reason for this investigation? (A) to test a hypothesis (B) to form a theory (C) to produce a scientific paper (D) to change previous results Answer: (A) to test a hypothesis

null

The evolutionary tendency of plants has been, firstly, to migrate from water to land ; and secondly, to make the modifications necessitated by the change from an aquatic to a terrestrial habitat.

Mercury_7263708

Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere?

{ "label": [ "A", "B", "C", "D" ], "text": [ "auroras", "tornadoes", "rainbows", "inversions" ] }

A

Question: Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere? (A) auroras (B) tornadoes (C) rainbows (D) inversions

Answer: (A) auroras

Answer: (D) inversions

Question: Which atmospheric phenomena are created by the interaction of charged particles with Earth's magnetosphere? (A) auroras (B) tornadoes (C) rainbows (D) inversions Answer: (A) auroras

Mercury_7013773

What takes place as a light wave enters a denser medium?

{ "label": [ "A", "B", "C", "D" ], "text": [ "it is reflected", "it is absorbed", "it is refracted", "it is compressed" ] }

C

Question: What takes place as a light wave enters a denser medium? (A) it is reflected (B) it is absorbed (C) it is refracted (D) it is compressed

Answer: (C) it is refracted

Answer: (A) it is reflected

Question: What takes place as a light wave enters a denser medium? (A) it is reflected (B) it is absorbed (C) it is refracted (D) it is compressed Answer: (C) it is refracted

null

They feed on termites and ants, either at night or during the day.

Mercury_7068618

Which renewable resource is used with photovoltaic cells to produce electricity?

{ "label": [ "A", "B", "C", "D" ], "text": [ "hydrothermal energy", "solar energy", "geothermal energy", "nuclear energy" ] }

B

Question: Which renewable resource is used with photovoltaic cells to produce electricity? (A) hydrothermal energy (B) solar energy (C) geothermal energy (D) nuclear energy

Answer: (B) solar energy

Answer: (C) geothermal energy

Question: Which renewable resource is used with photovoltaic cells to produce electricity? (A) hydrothermal energy (B) solar energy (C) geothermal energy (D) nuclear energy Answer: (B) solar energy

null

Some radiation exhibits high thermal conductivity.

null

Question: What are Titans not supposed to have? (A) hair (B) genitals (C) wings (D) fins Answer: (B) genitals

MCAS_2004_8_29

About how many Earth days does it take the Moon to travel around Earth?

{ "label": [ "A", "B", "C", "D" ], "text": [ "1", "27", "180", "365" ] }

B

Question: About how many Earth days does it take the Moon to travel around Earth? (A) 1 (B) 27 (C) 180 (D) 365

Answer: (B) 27

Answer: (A) 1

Question: About how many Earth days does it take the Moon to travel around Earth? (A) 1 (B) 27 (C) 180 (D) 365 Answer: (B) 27

null

With respect to what is preserved, there are several types of fossils.

null

They eat leaves, dead plant materials, fungi, and animal droppings.

TIMSS_1995_8_O12

Air is made up of many gases. Which gas is found in the greatest amount?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Nitrogen", "Oxygen", "Carbon dioxide", "Hydrogen" ] }

A

Question: Air is made up of many gases. Which gas is found in the greatest amount? (A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen

Answer: (A) Nitrogen

Answer: (C) Carbon dioxide

Question: Air is made up of many gases. Which gas is found in the greatest amount? (A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen Answer: (A) Nitrogen

TIMSS_2003_8_pg26

A powder made up of both white specks and black specks is likely to be

{ "label": [ "A", "B", "C", "D" ], "text": [ "a solution", "a pure compound", "a mixture", "an element" ] }

C

Question: A powder made up of both white specks and black specks is likely to be (A) a solution (B) a pure compound (C) a mixture (D) an element

Answer: (C) a mixture

Answer: (A) a solution

Question: A powder made up of both white specks and black specks is likely to be (A) a solution (B) a pure compound (C) a mixture (D) an element Answer: (C) a mixture

null

When a new environment becomes available, a succession of living things may colonise the area.

Mercury_SC_408557

Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture?

{ "label": [ "A", "B", "C", "D" ], "text": [ "Both substances mix evenly.", "Both substances can evaporate.", "One substance dissolves into another.", "One substance can be separated from the other." ] }

D

Question: Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture? (A) Both substances mix evenly. (B) Both substances can evaporate. (C) One substance dissolves into another. (D) One substance can be separated from the other.

Answer: (D) One substance can be separated from the other.

Answer: (C) One substance dissolves into another.

Question: Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture? (A) Both substances mix evenly. (B) Both substances can evaporate. (C) One substance dissolves into another. (D) One substance can be separated from the other. Answer: (D) One substance can be separated from the other.

null

Some experts consider tolerance tests.

NYSEDREGENTS_2005_8_32

Evidence that living things have evolved over hundreds of millions of years can be found in

{ "label": [ "1", "2", "3", "4" ], "text": [ "particles in the air", "rocks containing fossils", "tree rings from recently logged trees", "chemicals in human hair" ] }

2

Question: Evidence that living things have evolved over hundreds of millions of years can be found in (1) particles in the air (2) rocks containing fossils (3) tree rings from recently logged trees (4) chemicals in human hair

Answer: (2) rocks containing fossils

Answer: (3) tree rings from recently logged trees

Question: Evidence that living things have evolved over hundreds of millions of years can be found in (1) particles in the air (2) rocks containing fossils (3) tree rings from recently logged trees (4) chemicals in human hair Answer: (2) rocks containing fossils

null

The term growth involves two distinct ideas which are not always carefulfy dis- tinguished.

Mercury_7172410

The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?

{ "label": [ "A", "B", "C", "D" ], "text": [ "deposition", "weathering", "precipitation", "photosynthesis" ] }

B

Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process? (A) deposition (B) weathering (C) precipitation (D) photosynthesis

Answer: (B) weathering

Answer: (D) photosynthesis

Question: The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process? (A) deposition (B) weathering (C) precipitation (D) photosynthesis Answer: (B) weathering

null

Some air carries diseases.