Question: Coral reefs are found in shallow tropical ocean waters. A coral reef is a diverse ecosystem that is supported by the photosynthesis of marine plants and the algae that live within the tissues of the coral. Given this information, when would the waters in a coral reef likely have the highest dissolved oxygen concentration?

Choices:
A. 7 a.m.
B. 2 p.m.
C. 9 p.m.
D. midnight

Answer: B


Question: What keeps the planets in orbit around the Sun?

Choices:
A. tides
B. gravity
C. electricity
D. magnetism

Answer: B


Question: As seen from Earth, the appearance of the Moon changes throughout the month. What causes the appearance of the Moon to change?

Choices:
A. Earth rotating on its axis
B. the Moon rotating on its axis
C. Earth revolving around the Sun
D. the Moon revolving around Earth

Answer: D


Question: In producing an automobile, which of the 27 following is the best use of a robot?

Choices:
A. to perform repetitive tasks
B. to determine the trunk space
C. to demonstrate passenger comfort
D. to perform quality control inspections

Answer: A


Question: The Theory of Plate Tectonics is based on

Choices:
A. evidence of sea floor spreading.
B. topographic mapping of mountain ranges.
C. an analysis of soil at the plate boundaries.
D. volcanic activity along coastlines.

Answer: A


Question: Which of the following must all plant and animal species do in order for each species to survive?

Choices:
A. migrate
B. reproduce
C. make food
D. change color

Answer: B


Question: Which activity illustrates the main function of the motor neuron complex?

Choices:
A. transferring impulses to the appropriate muscle
B. receiving sensory impulses from the environment
C. delivering regular impulses to the autonomic system
D. processing impulses within the cerebral cortex

Answer: A


Question: Nutrients are recycled when materials decompose in an ecosystem. Which is the best example of the decomposition process where organic material is recycled in an ecosystem?

Choices:
A. a hawk eating a mouse
B. worms tunneling through soil
C. bacteria feeding on dead plants
D. a plant using nitrogen to make proteins

Answer: C


Question: What is one function of tree roots?

Choices:
A. to absorb sunlight
B. to absorb water
C. to make seeds
D. to make food

Answer: B


Question: Food contains stored chemical energy. Which units of measurement can be used to compare the amounts of energy in different foods?

Choices:
A. calories
B. decibels
C. newtons
D. watts

Answer: A


Question: The freezing and expanding of water in the cracks of rocks is a form of

Choices:
A. weathering.
B. deposition.
C. faulting.
D. erosion.

Answer: A


Question: Which of the following is a way that everyone can help with conservation efforts?

Choices:
A. camp in the woods
B. use biodegradable materials
C. visit a landfill
D. use disposable plates

Answer: B


Question: Historically, how has the compass been used?

Choices:
A. for navigation
B. to predict weather
C. to measure temperature
D. for mineral identification

Answer: A


Question: A cut to the skin is treated with antiseptic first to avoid

Choices:
A. an immune response.
B. a bacterial infection.
C. bruising of tissues.
D. an allergic reaction.

Answer: B


Question: Which would be a safe practice to exercise during laboratory investigations?

Choices:
A. using open flames to heat all materials
B. keeping your cell phone on the laboratory countertop
C. knowing where your instructor/laboratory leader is at all times
D. removing your safety glasses when moving from station to station

Answer: C


Question: The shape of the moon appears to change regularly during each month. Which of the following best explains why the shape of the moon appears to change?

Choices:
A. The Earth turns on its axis.
B. The Moon turns on its axis.
C. The Moon orbits around the Earth.
D. Clouds cover the Moon.

Answer: C


Question: How do the nutrients necessary for plant growth get into the soil?

Choices:
A. The soil absorbs sunlight.
B. Water filters through the soil.
C. Organic matter is decayed in the soil.
D. The soil is exposed to air.

Answer: C


Question: Which part of a sunflower plant absorbs water and nutrients?

Choices:
A. Roots
B. Stems
C. Leaves
D. Flowers

Answer: A