The Carbon Cycle (PART 2)

Name

What are the two parts of the carbon cycle?

• The fast cycle and the slow cycle
• The air cycle and the water cycle
• The plant cycle and the animal cycle
• The land cycle and the sea cycle

What happens when plants die or are eaten by animals?

• The carbon is released back into the air.
• The carbon is stored in the soil.
• The carbon is used to make new plants.
• The carbon is lost from the environment.

What is one way humans have changed the carbon cycle?

• We plant more trees.
• We use less water.
• We burn fossil fuels.
• We recycle more paper.

What is the main reason the ocean is becoming more acidic?

• The ocean is absorbing too much carbon dioxide from the air.
• The ocean is losing too much oxygen.
• The ocean is getting warmer.
• The ocean is getting saltier.

What happens to the carbon in plants when they die or are eaten by animals?

• It is lost from the environment.
• It is stored in the soil.
• It is released back into the air.
• It is used to make new plants.

Which of these is NOT a fossil fuel?

• Coal
• Oil
• Gas
• Wood

What is the main difference between the fast and slow carbon cycles?

• The fast cycle happens in the air, while the slow cycle happens in the ocean.
• The fast cycle happens quickly, while the slow cycle takes millions of years.
• The fast cycle involves plants, while the slow cycle involves rocks.
• The fast cycle is caused by humans, while the slow cycle is natural.

How does burning fossil fuels affect the carbon cycle?

• It adds more carbon dioxide to the air.
• It removes carbon dioxide from the air.
• It makes the ocean more acidic.
• It causes plants to grow faster.

What is the process called when carbon is released back into the air from plants or animals?

• Photosynthesis
• Respiration
• Decomposition
• Combustion