Carbon Cycle CP review

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

• Water
• Atmosphere
• Sun
• Air

Which one of these does not add CO2 to the atmosphere?

• cooking with gas
• planting trees
• burning wood
• riding in a bus

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

• respiration and photosynthesis
•  decomposition and respiration

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

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

• water
• nutrients
• air
• fossil fuels

All of the carbon in existence is continually recycled in the carbon cycle

• True
• False

How do animals get carbon?

• By eating plants and or other animals.

• They absorb it from the atmosphere.

• From the ground

• They do not get carbon from anywhere.

How do animals get carbon?

• By eating plants and or other animals.

• They absorb it from the atmosphere.

• From the ground

• They do not get carbon from anywhere.

When humans EXHALE, we release __________________.

• Oxygen

• Carbon Dioxide

• Nitrogen

• Water

If the plant population decreased, the amount of carbon in the atmosphere would ____________________.

• Increase

• Decrease

• Stay the same