Carbon cycle #1

Where does carbon begin in the carbon cycle?

• In humans

• In the atmosphere

• In the ground

• There is no beginning because it is a cycle.

The diagram below shows parts of the carbon cycle. Which arrow represents the movement of carbon caused by cellular respiration?

• A

• B

• C

• D

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

Combustion is another word for _______________.

• a train
• a bus
• a dog
• burning

What does not produce carbon dioxide?

• Photosynthesis
• Burning Fossil Fuels
• Animal respiration
• Plants decaying

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

In what process is Carbon transformed into chemical energy?

• Photosynthesis
• Respiration
• Primary Production
• Secondary Production

Carbon can be found in...?

• The atmosphere
• Inside of the Earth
• Fossil fuels
• All of the above!

Carbon dioxide is produced by the burning of fossil fuels

• True
• False

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death