The Nitrogen Cycle

What is this a picture of?

• Nitrogen cycle
• carbon cycle
• water cycle
• plant cycle

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NGSS.MS-LS2-3

NGSS.MS-ESS2-1

Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert

• nitrates intro nitrogen gas
• ammonia into proteins
• nitrogen gas into ammonia
• proteins into nitrates

Organisms use nitrogen to form

• carbohydrates and lipids
• proteins and lipids
• lipids and nucleic acids
• proteins and nucleic acids

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NGSS.MS-LS1-7

When nitrogen gas is turned in to a form that plants and animals can use is called 

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

What happens when organisms die and decay? 

• Their nitrogen moves to the air as nitrogen gas
• Their nitrogen returns to the soil as ammonium
• Their nitrogen becomes tapped in clay and is unusable
• They stay on earth forever

Tags

NGSS.MS-LS2-3

Nitrification is _________.

• production of nitrates from ammonia (NO3) for plants to use.

• conversion of nitrate to nitrogen gas, which is released back into the atmosphere.

• the condensing of water molecules.

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NGSS.MS-LS2-3

This is the conversion of nitrate to nitrogen gas, which is released back into the atmosphere.

• Nitrogen Fixation

• Evaporation

• Denitrification

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NGSS.MS-LS2-3

The production of ammonia by bacteria during the decay of organic matter is

• Denitrification

• Ammonification

• Crazy

• Precipitation

Tags

NGSS.MS-LS2-3

How nitrogen is "fixed" into useable form for plants

• only through action of bacteria
• only through lightning
• through action of bacteria & lightning
• through photosynthesis

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust