Carbon Cycle

How do humans add carbon dioxide to the atmosphere?

• Through photosynthesis and burning fossil fuels

• Through cellular respiration, burning biomass and burning fossil fuels in cars and factories

• By garbage decomposition

• Through eating plants and animals and cutting down forests

How do humans take in carbon?

• Through the food they eat

• Through respiration

• By breathing in carbon dioxide

• From the soil

How did the industrial revolution impact the carbon cycle?

• It increased the amount of carbon stored in the soil and increased the amount of carbon in the atmosphere

• It increased the amount of carbon stored in the soil and decreased the amount of carbon in the atmosphere

• It decreased the amount of carbon stored in the soil and increased the amount of carbon in the atmosphere

• It decreased the amount of carbon stored in the soil and decreased the amount of carbon in the atmosphere

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True or false?

The amount of carbon on our planet has increased since the industrial revolution.

• True

• False

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True or false?

The amount of carbon on our planet never increases or decreases, it just changes form.

• True

• False

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What form does carbon take in the atmosphere?

• Methane

• Air

• Carbon dioxide

• Sugar

Which of the following statements is most accurate?

• There is a finite amount of carbon on Earth, and it cycles through living and nonliving things in the carbon cycle.

• The amount of carbon on Earth gradually increases and decreases over time.

• Carbon cycles through the food chain as organisms are eaten, and then is decomposed and disappears once the organisms die.

• Carbon is able to leave the atmosphere by evaporating into space

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Specific carbon atoms from a dead animal can be traced to the leaves of a living plant. What can you infer from this?

• Carbon only exists in plants

• The animal must have eaten the plant

• Plants store more carbon than animals

• Carbon is moved throughout many different objects, but the total amount of carbon on Earth doesn't change

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What gas is used in photosynthesis to help produce glucose?

• Oxygen

• Carbon Monoxide

• Methane

• Carbon dioxide

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How are photosynthesis and cellular respiration related?

• They are not related

• They both need the same things to work

• The products from one are needed as the reactants for the other

• They both produce the same things

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