Nitrogen Cycle

What is the role of bacteria in the nitrogen cycle?

• They convert nitrogen into oxygen.

• They convert nitrogen into a usable form for plants.

• They convert nitrogen into carbon dioxide.

• They have no role in the nitrogen cycle.

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What is the nitrogen cycle?

• Describes how nitrogen moves through the environment between living things, the soil, and the atmosphere.

• Describes the movement of water between Earth and its atmosphere.

• An idealized model that explains the development of relief in landscapes

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NGSS.MS-LS2-1

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What is the order of the nitrogen cycle?

• nitrogen fixation > denitrification > ammonification > nitrification > assimilation

• nitrogen fixation > assimilation > ammonification > nitrification > denitrification

• ammonification > denitrification > nitrogen fixation > nitrification > assimilation

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NGSS.MS-LS2-3

Which organisms are responsible for nitrogen fixation?

• Fungi and algae

• Plants and animals

• Viruses and protists

• Bacteria and archaea

What is the process of nitrification?

• The process of nitrification involves the conversion of ammonia to nitrate and then to nitrite by bacteria.

• The process of nitrification involves the conversion of nitrate to nitrite and then to ammonia by bacteria.

• The process of nitrification involves the conversion of nitrite to ammonia and then to nitrate by bacteria.

• The process of nitrification involves the conversion of ammonia to nitrite and then to nitrate by bacteria.

Which organisms are responsible for ammonification?

• Plants and animals

• Viruses and protozoa

• Algae and archaea

• Bacteria and fungi

What is the process that turns nitrogen into ammonia?

• Assimilation

• Nitrogen Fixation

What is nitrogen fixation?

• The process of converting nitrogen into oxygen.

• The process of converting oxygen into nitrogen.

• The process of converting carbon dioxide into nitrogen.

• Conversion of nitrogen gas into a usable form

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NGSS.MS-LS2-1

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How do nitrates go back to atmospheric nitrogen in the nitrogen cycle?

• By animal consumption

• By plant absorption

• By water evaporation

• By lightning strikes

What is the name of the process where nitrates are converted back to atmospheric nitrogen?

• Denitrification

• Nitrogen transformation

• Nitrogen fixation

• Nitrogenation