Nitrogen Cycle

Which biomolecules rely on nitrogen being available to be produced by a cell to maintain life? (Select 2)

• Protein

• Carbohydrate

• Nucleic Acid

• Lipid

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NGSS.MS-LS2-3

NGSS.MS-LS1-2

How is nitrogen "fixed" into a usable form for plants?

• Through action of bacteria only

• Through lightning only

• Through action of bacteria and lightning

• Through photosynthesis

How do animals get the nitrogen they need?

• From the air they breathe

• From the water they drink

• From the food they eat

• From the sun

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Plants and animals cannot use nitrogen directly from the air.

• True

• False

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NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

According to this diagram, plants use nitrogen to make _________________________

• carbohydrates

• cellulose

• proteins

• unsaturated fats

Tags

NGSS.MS-LS2-1

What would be a consequence of removing the decomposers from an ecosystem?

•  Plants would not need to absorb nitrogen from the soil any longer

• Lightening would no longer convert nitrogen gas into ammonia

• Plants would begin decomposing organisms instead of performing photosynthesis

• Nitrogen would remain trapped in the tissues of dead organisms

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NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What does the color green indicate on the map

• There was a deficiency of nitrogen fertilizer in the soil

• There was an excess of nitrogen fertilizer in the soil

• There was exactly enough nitrogen fertilizer in the soil

• No fertilizer was used

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-ESS3-4

Known as eutrophication, excess fertilizer runoff in aquatic ecosystems causes -

• too much oxygen in the water

• algae to die

• algal blooms

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NGSS.MS-LS2-3

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Humans add nitrogen to the nitrogen cycle by -

• burning fossil fuels

• cellular respiration

• using fertilizers

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS3-4

What % of the air is made of nitrogen?

• 21%

• 52%

• 61%

• 78%