Carbon Cycle Quiz

Which of the following is/are part of the carbon cycle in ecosystems?

• plant and animal respiration
• decomposition
• photosynthesis
• all of the above

Plants are the primary consumers of carbon dioxide.

• True
• False

Humans produce carbon dioxide during respiration.

• True
• False

The geologic (underground) portion of the carbon cycle takes a few days to complete.

• True
• False

Plants directly obtain carbon from ---

• animals
• water
• fossil fuels
• air

The soil contains carbon, but how did it get there?

• when plants die
• when animals die
• all of the above

Carbon is commonly found in ---

• the earth
• all living things
• volcanic gases
• all of the above

Which of the following processes adds carbon to the atmosphere?

• plant respiration
• burning of fossil fuels
• volcanic eruptions
• all of the above

Some trees lose their leaves in the fall. These leaves fall to the ground and release carbon through the process of ---

• cellular respiration
• photosynthesis
• transpiration
• decomposition

Plants remove carbon dioxide from the environment using a process called ---. Then, they release oxygen.

• cellular respiration
• photosynthesis
• transpiration
• decomposition