What is the primary role of the carbon cycle?

• Regulating the Earth's climate and supporting life

• Producing energy from fossil fuels

• Increasing the Earth's temperature

• Reducing the amount of oxygen in the atmosphere

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Which organisms are involved in the process of photosynthesis?

• Humans and animals

• Animals and fungi

• Plants, algae, and some bacteria

• Only terrestrial plants

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What are the main products of photosynthesis?

• Oxygen and carbon dioxide

• ATP and glucose

• Carbon dioxide and water

• Glucose and oxygen

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What does cellular respiration produce?

• Oxygen and glucose

• Sunlight and chlorophyll

• Carbon dioxide, water, and ATP

• Water and sunlight

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What is the role of chlorophyll in photosynthesis?

• It captures carbon dioxide from the atmosphere

• It absorbs sunlight and converts it into energy

• It produces ATP for cellular activities

• It releases oxygen into the atmosphere

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How do human activities impact the carbon cycle?

• By decreasing the Earth's temperature

• By releasing more carbon dioxide through burning fossil fuels

• By increasing the number of trees on Earth

• By reducing the amount of sunlight reaching Earth

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What is the effect of cutting down trees on the carbon cycle?

• It decreases the amount of carbon dioxide in the atmosphere

• It enhances the efficiency of photosynthesis

• It increases the production of ATP

• It reduces the number of 'carbon cleaners' on Earth

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What is the main energy molecule produced during cellular respiration?

• Carbon dioxide

• Chlorophyll

• Glucose

• ATP (adenosine triphosphate)

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Complete the diagram using the options below.

a

b

c

d

e

f

Photosynthesis

Fossil Fuels

Carbon in the Atmosphere

Combustion

Decomposition

Cellular Respiration

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Plants, Animals, and some Unicellular organisms use this process to make energy: (a)   + oxygen ⇒ water + (b)   + (c)  

• glucose

• carbon dioxide

• ATP energy

• sunlight

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