Carbon Cycle

In the atmosphere, carbon is present in what form?

• carbon dioxide

• plants

• animals

• carbonation

What do plants do with the carbon dioxide they take in from the atmosphere?

• use it in photosynthesis to make oxygen

• plants don't use it

• they release it back into the atmosphere

• they die when they take it in

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The burning of these has put more carbon back into the atmosphere than can be cycled naturally.

• fossil fuels

• forests

• logs

• candles

Tags

NGSS.MS-ESS3-4

According to the diagram, what process puts carbon directly into the ground?

• photosynthesis

• respiration

• decomposition

• burning of fossil fuels

According to the diagram, the sources of respiration that contribute carbon to the atmosphere are

• burning of fossil fuels

• plants, animals, and bodies of water

• decomposition

• diffusion

Tags

NGSS.MS-ESS3-4

Name one way in which carbon dioxide enters the atmosphere

The world's oceans hold most of the carbon in a dissolved form. These marine organisms use the carbon and release oxygen back into the atmosphere.

• algae

• trees

• seashells

• dolphins

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In the last 150 years, the concentration of carbon dioxide in the atmosphere has ________ dramatically.

• risen

• stayed the same

• decreased

Tags

NGSS.MS-ESS3-5

What does the greenhouse effect do to the Earth?

• it warms Earth

• it makes Earth cooler

• it does not effect Earth

• it causes clouds to cover the Earth