The Carbon Cycle Quiz

Carbon is one of the main elements that is essential for life on Earth.

• True

• False

Carbon is the most abundant element in the universe.

• True

• False

The atmosphere is the only part of the Earth that has carbon.

• True

• False

Fossil fuels are formed from the decomposition of organisms (containing carbon compounds) that died millions of years ago.

• True

• False

Carbon is a chemical element with the symbol _________.

• C

• Ca

• Co

• Cu

__________ is the movement and exchange of carbon between the land, the oceans, the atmosphere, and the Earth's interior.

• Carbon cycle

• Water cycle

• Nitrogen cycle

• Oxygen cycle

The burning of fossil fuels __________ carbon dioxide in Earth's atmosphere.

• increases

• decreases

• stabilizes

• eliminates

What process in the carbon cycle involves plants taking in carbon dioxide?

• Photosynthesis

• Respiration

• Decomposition

• Combustion

In the carbon cycle, what is the role of decomposers?

• Release carbon dioxide

• Absorb carbon dioxide

• Convert carbon dioxide to oxygen

• Store carbon dioxide

What is the main source of carbon for plants in the carbon cycle?

• Soil

• Water

• Carbon dioxide

• Oxygen