Carbon Cycle

Where does the carbon cycle begin?

• Plants
• Dead organisms
• Sunlight
• In the air

Does the carbon cycle sustain life?

• No
• Yes

How does carbon dioxide leave the atmosphere?

• Through transpiration
• Through photosynthesis
• Through factory emission
• Sunlight

What is one way that carbon enters the atmosphere?

• Sunlight
• Factory emissions
• Ocean uptake
• Rain

Do plants support the carbon cycle?

• Yes
• No

Have humans added too much carbon dioxide into the air?

• No
• Yes

When carbon combines with oxygen, what forms?

• Nitrogen
• Argon
• Carbon dioxide
• Sodium hydrogen

What is the purpose of carbon dioxide?

• To cool down our planet
• To block out UV rays
• To trap heat andwarm up our planet
• To let sunlight escape

Is oxygen part of the carbon cycle?

• Yes
• No