What is the primary gas responsible for the Earth's greenhouse effect?

A) Oxygen
B) Carbon dioxide
C) Hydrogen
D) Nitrogen
E) Methane

Correct Answer: B) Carbon dioxide
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 What is the process by which plants make their own food using sunlight?

A) Respiration
B) Photosynthesis
C) Fermentation
D) Digestion
E) Transpiration

Correct Answer: B) Photosynthesis
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What is the chemical symbol for the element gold?

A) G
B) Au
C) Ag
D) Go
E) Gl

Correct Answer: B) Au

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What is the fundamental unit of life, capable of carrying out all the functions essential for living organisms?

A) Cell
B) Atom
C) Molecule
D) Gene
E) Tissue

Correct Answer: A) Cell

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Which planet is often referred to as the "Red Planet" due to its reddish appearance?

A) Venus
B) Jupiter
C) Mars
D) Mercury
E) Saturn

Correct Answer: C) Mars