The Carbon Cycle

The circulation of the element Carbon among Earth's atmosphere, land, oceans, and organisms is called _____________.

• the Carbon Cycle

• the Oxygen Cycle

• the Carbon dioxide Cycle

• the Water Cycle

The total amount of the carbon on Earth is constant.

• True

• False

Carbon is used in the process called __________ by plants and algae to make food and the building blocks for growth.

• carbon cycle

• life

• photosynthesis

• decomposition

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

Tags

NGSS.HS-ESS2-6

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

Tags

NGSS.HS-LS2-5

How do animals get carbon?

• By eating plants and or other animals.

• They absorb it from the atmosphere.

• From the ground

• They do not get carbon from anywhere.

Carbon moves from fossil fuels to the atmosphere when fuels are burned.

• True

• False

How is the carbon cycle similar to the water cycle?

• Both involve liquid substances falling to the Earth from the atmosphere?

• Neither process works at low temperature.

• Both involve the transfer of substances between animals, plants, and the Earth.

• Both involve the transfer of substances between the earth and outer space.

What is a carbon sink?

• Something that adds to the atmosphere.

• Something that removes carbon from the atmosphere.

• Something that adds carbon to the earth's crust.

• Something that removes carbon from the earth's crust.

Which process converts carbon in the form of sugar into carbon dioxide gas?

• Bioremediation
• Photosynthesis
• Respiration
• Transpiration