Understanding the Carbon Cycle

What is the chemical symbol for carbon, and where is it found?

• Co, in the atmosphere

• Cu, in the earth's crust

• Ca, in the ocean

• C, on the periodic table

Which process allows plants to absorb carbon dioxide from the atmosphere?

• Combustion

• Decomposition

• Photosynthesis

• Respiration

What happens to plants after they die that contributes to the carbon cycle?

• They are buried and form fossil fuels

• They undergo photosynthesis

• They are eaten by animals

• They release oxygen into the air

How do marine organisms contribute to the carbon cycle?

• By undergoing photosynthesis on land

• By burning fossil fuels

• By releasing carbon dioxide during respiration

• By absorbing carbon dioxide to build shells

What natural event can add extra carbon dioxide to the atmosphere?

• Earthquakes

• Tsunamis

• Volcanic eruptions

• Hurricanes