Biogeochemical Cycles

Label the nitrogen cycle processes

b

c

d

e

a

Denitrification

Assimilation

Nitrification

Nitrogen Fixation

Ammonification

Tags

NGSS.MS-LS2-3

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

• bacteria

• rain

• fungi

• car exhaust

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS2-3

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

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition

• nitrogen fixation

• ammonia

• denitrification

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

• Assimilation

• Fixation

• Ammonification

• Denitrification

Tags

NGSS.MS-LS2-3

Plants and animals cannot use nitrogen directly from the air.

• True

• False

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Match the following steps of the nitrogen cycle to how they move bacteria.

• Ammonification

• Geosphere to Atmosphere

• Assimilation

• Biosphere to Geosphere

• Denitrification

• Atmosphere to Geosphere

• Nitrogen Fixation

• Geosphere to Biosphere

Tags

NGSS.MS-ESS2-1