Nitrogen Cycle

Which nitrogen cycle process is occurring when bacteria convert ammonium to nitrite and then into nitrate?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Tags

NGSS.MS-LS2-3

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

• bacteria

• rain

• fungi

• car exhaust

Tags

NGSS.MS-LS2-3

The process in which nitrogen circulates and is recycled is called

• The nitrogen cycle

• The carbon cycle

• The water cycle

• The phosphorus cycle

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

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

NGSS.MS-LS1-7

What is the formula for atmospheric nitrogen?

• N

• N₂

• NH₃

• NO₃

Tags

NGSS.MS-PS1-1

Bacteria fix nitrogen from the atmosphere into a form plants can use.

• True

• False

Tags

NGSS.MS-LS2-3

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

Tags

NGSS.MS-LS2-3

All plants have nitrogen fixing bacteria in their roots.

• True

• False

Tags

NGSS.MS-LS2-1

What % of the air is made of nitrogen?

• 21%

• 52%

• 61%

• 78%

Tags

NGSS.MS-PS1-1