Carbon Cycle

Combustion is another word for __________.

• Transportation
• Respiration
• Fossil Fuels
• Burning

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Decomposers remove carbon dioxide from the atmosphere.

• True

• False

Carbon can be found in...

• The atmosphere
• Soil
• Fossil fuels
• All of the above

Organisms that do not decompose can be buried and become what?

• water
• nutrients
• air
• fossil fuels

What does NOT produce carbon dioxide?

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

Respiration releases energy to the environment in the form of heat.

• True

• False

What process occurs when coal (fossil fuel) is used for energy?

• Decomposition
• Combustion
• Pressurization 
• Respiration 

The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?

• X : Respiration
  Y : Predation
• X : Adaptation
  Y : Decomposition
• X : Fermentation
  Y : Nitrogen Fixation
• X : Decomposition
  Y : Respiration

TRUE or FALSE?
All of the carbon in existence is continually recycled in the carbon cycle.

• True
• False