The Nitrogen Cycle Test

How nitrogen is "fixed" into useable form for plants

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

Tags

NGSS.MS-LS2-3

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

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-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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

• True

• False

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Bacteria create a form of nitrogen that animals can use directly.

• True

• False

What is the role of denitrifying bacteria

• change nitrate back into nitrogen gas

• change nitrogen gas into nitrate

• absorb carbon dioxide in the soil

• release oxygen gas into the atmosphere

Tags

NGSS.MS-LS2-3

What percent of the atmosphere is compose of Nitrogen?

• 18%

• 8%

• 78%

• 70%

Why do all organisms need nitrogen?

• To build protein and DNA

• To build phosphorus

• To make oxygen levels grow

• To help blood circulate better

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is the correct order for the stages of the nitrogen cycle?

• Denitrification, Nitrogen Fixing, Nitrification

• Nitrification, Denitrification, Nitrogen Fixing

• Nitrogen Fixing, Nitrification, Denitrification

• Nitrification, Nitrogen Fixing, Denitrification

Tags

NGSS.MS-LS2-3