Carbon and Nitrogen Cycle Review

Only special bacteria can directly use nitrogen in our atmosphere and modify it into a usable form for plants and animals. This process is called

• nitrogen fixation

• denitrification

• decomposition

• nitrogen renewal

Tags

NGSS.MS-LS2-3

What part of the carbon cycle is represented by C?

• combustion

• decomposition

• cellular respiration

• photosynthesis

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What part of the carbon cycle is represented by D?

• combustion

• cellular respiration

• photosynthesis

• decomposition

Tags

NGSS.MS-LS1-6

What part of the carbon cycle is represented by B?

• photosynthesis

• decomposition

• cellular respiration

• combustion

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Approximately what percentage of our atmosphere is made up of Nitrogen?

• 90%

• 10%

• 78%

• 42%

Why is combustion an important process in the carbon cycle?

• It turns fossil fuels into carbon dioxide.

• It turns once living things and organic matter into fossil fuels.

• It turns carbon dioxide into glucose, so animals can eat the carbon.

• It turns glucose into carbon dioxide, which gets released into the air.

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NGSS.MS-ESS2-1

NGSS.MS-ESS3-4

If the amount of plants on Earth decrease, the amount of carbon would...

• Stay the same

• Increase

• Decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is the primary role of decomposers in the nitrogen cycle?

• Convert nitrogen gas into ammonia

• Break down organic matter to release nitrogen

• Fix atmospheric nitrogen into nitrates

• Absorb nitrates from the soil

Which process in the carbon cycle is responsible for removing carbon dioxide from the atmosphere?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

Tags

NGSS.MS-LS1-6

In the nitrogen cycle, what is the process by which nitrates are converted back into nitrogen gas?

• Nitrogen fixation

• Nitrification

• Denitrification

• Ammonification

Tags

NGSS.MS-LS2-3