Carbon cycle yr 10

Which gas do plants release, that humans depend on for survival?

• Water

• Carbon Dioxide

• Oxygen

• Sugar

The process of plants turning carbon dioxide and water into oxygen and sugar is called

• Respiration

• Oxidation

• Photosynthesis

• Combustion

How do plants affect the air that animals and people breathe?

• Plants use oxygen from the air to make their own food

• Plants release pollution into the air

• Plants take in carbon dioxide and release oxygen

• Plants take in oxygen and release carbon dioxide

Which gas do animals release, that plants depend on for survival?

• Carbon dioxide

• Oxygen

• Sunlight

• Water

How does the human body return carbon to the atmosphere in the carbon cycle?

• Waste products

• Photosynthesis

• Cellular respiration

• Formation of glucose

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

• water
• nutrients
• air
• fossil fuels

Why is burning fossil fuels harmful?

• they cause cancer

• They can get extremely hot

• it increases the amount of carbon dioxode/greenhouse gases in the air

• this would destroy fossils

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

The atmosphere contains ____% carbon dioxide.

• 78%

• 21%

• 1-4%

• 0.4%

Respiration is the process by which animals take in _____ and release _____. 

• photosynthesis, air
• carbon, oxygen
• oxygen
• oxygen, carbon dioxide