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Which human activity significantly impacts the carbon cycle by increasing atmospheric carbon dioxide levels?

• Planting trees

• Burning fossil fuels

• Using solar energy

• Recycling materials

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In the carbon cycle, what is the role of decomposers?

• They convert carbon dioxide into glucose.

• They break down dead organisms, releasing carbon back into the environment.

• They store carbon in their bodies for long periods.

• They transform carbon into nitrogen compounds.

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FL.SC.8.L.18.3

What is the effect of deforestation on the carbon cycle?

• It increases the amount of carbon stored in the soil.

• It decreases the amount of carbon dioxide in the atmosphere.

• It reduces the number of trees that can absorb carbon dioxide.

• It enhances the process of photosynthesis.

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FL.SC.8.L.18.3

Which process in the carbon cycle is primarily responsible for the formation of fossil fuels?

• Photosynthesis

• Respiration

• Decomposition

• Sedimentation and burial

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FL.SC.8.L.18.3

How does volcanic activity affect the carbon cycle?

• It decreases atmospheric carbon dioxide levels.

• It releases stored carbon dioxide into the atmosphere.

• It converts carbon dioxide into oxygen.

• It absorbs carbon dioxide from the atmosphere.

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FL.SC.8.L.18.3

Which of the following best explains the importance of the carbon cycle to ecosystems?

• It provides a source of energy for all living organisms.

• It ensures a constant supply of carbon for building organic molecules.

• It regulates the Earth's temperature by controlling oxygen levels.

• It prevents the accumulation of nitrogen in the atmosphere.

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FL.SC.8.L.18.3

What is the primary source of carbon for the carbon cycle?

• Carbon dioxide in the atmosphere

• Carbon stored in rocks

• Carbon found in the ocean

• Carbon in fossil fuels

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FL.SC.8.L.18.3

Which of the following processes releases carbon dioxide into the atmosphere?

• Photosynthesis

• Respiration

• Nitrogen fixation

• Evaporation

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FL.SC.8.L.18.3

Which of the following is a carbon sink?

• A coal-fired power plant

• A forest

• A car engine

• A plastic factory

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FL.SC.8.L.18.3

Gabrielle makes a simple model of the carbon cycle. Which of the following does she NOT need to include?

• Atomsphere

• Industry

• Shipping

• Vegetation

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