Understanding the Carbon Cycle

What is the carbon cycle?

• The process by which carbon moves between the atmosphere and living things.

• A method of storing carbon in the ocean.

• A way to measure carbon emissions.

• A cycle that only involves plants.

Where can we find carbon?

• Only in the atmosphere.

• In carbon reservoirs like food and air.

• Only in the ocean.

• In rocks only.

What happens when carbon dioxide mixes with rainwater?

• It forms a weak acid.

• It creates oxygen.

• It evaporates.

• It becomes solid.

What do rivers carry to the ocean?

• Carbon dioxide.

• Minerals like calcium and magnesium.

• Fish.

• Plastic waste.

What do tiny sea animals use to build shells?

• Calcium carbonate.

• Sand.

• Oxygen.

• Carbon dioxide.

What happens to the shells of dead sea animals?

• They float on the surface.

• They sink to the ocean floor.

• They dissolve in water.

• They are eaten by other animals.

What do tectonic forces do to rocks over millions of years?

• Push them deep underground.

• Melt them into lava.

• Break them into sand.

• Turn them into fossils.

What is released through volcanoes?

• Water.

• Oxygen.

• CO2.

• Nitrogen.

Why is the slow carbon cycle important?

• It helps regulate Earth's climate.

• It increases carbon emissions.

• It has no effect on climate.

• It only affects plants.

What is a metric ton equivalent to?

• 1,000 kilograms.

• 500 kilograms.

• 2,000 kilograms.

• 1,500 kilograms.