Carbon Cycle Quiz

What is the role of marine organisms in the geological carbon cycle?

• They release carbon dioxide into the atmosphere.

• They convert carbon dioxide into organic compounds.

• They build shells and skeletons from dissolved carbon.

• They absorb carbon dioxide from the atmosphere.

Once carbon is incorporated into the shells and skeletons of marine organisms, what happens to it?

• It is released back into the atmosphere.

• It undergoes photosynthesis.

• It sinks to the ocean floor.

• It becomes part of the biosphere.

How does sedimentation contribute to the geological carbon cycle?

• By releasing carbon dioxide into the atmosphere

• By storing carbon in the geosphere as sedimentary rocks

• By converting carbon into organic compounds

• By absorbing carbon dioxide from the atmosphere

What process occurs in the biosphere where plants absorb carbon dioxide from the atmosphere?

• Respiration

• Sedimentation

• Photosynthesis

• Burial

Which part of the Earth includes the solid parts like the crust, mantle, and core?

• Atmosphere

• Biosphere

• Geosphere

• Hydrosphere

Where do marine organisms primarily contribute to the carbon cycle?

• Atmosphere

• Biosphere

• Geosphere

• Hydrosphere

How do organisms release carbon dioxide into the atmosphere in the biological carbon cycle?

• Through sedimentation

• Through photosynthesis

• Through respiration

• Through burial

In the carbon cycle, which reservoir involves the layer of gases surrounding the Earth?

• Atmosphere

• Biosphere

• Geosphere

• Hydrosphere

What process occurs in the biosphere where plants absorb carbon dioxide from the atmosphere?

• Respiration

• Sedimentation

• Photosynthesis

• Burial

Which reservoir in the carbon cycle involves the layer of gases surrounding the Earth?

• Atmosphere

• Biosphere

• Geosphere

• Hydrosphere