The Nitrogen cycle

What % of the air is made of nitrogen?

• 21%

• 52%

• 61%

• 78%

True or False. The nitrogen in the atmosphere is in the right form for living things to use.

• True

• False

nitrogenous compounds from dead plants & animals is converted to nitrogen and released back into atmosphere via...

• decomposition

• ammonification

• assimilation

• denitrification

Tags

NGSS.MS-LS2-3

This can transform nitrogen in the atmosphere into a usable form of nitrogen

• rain

• ice

• lightning

• sun

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

• nitrogen composition
• ammonia 
• nitrogen fixation
• denitrification

Which row describes a method for making hydrogen, a use of hydrogen, and a test for hydrogen?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to this diagram, plants use nitrogen to make _________________________

• carbohydrates

• cellulose

• proteins

• unsaturated fats

Tags

NGSS.HS-LS1-6

Reaction between hydrogen and nitrogen gives

• ammonia

• ammonium

• ash

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the nitrogen cycle, what does label A in the diagram represent?

• Gas

• Clouds

• Carbon dioxide in the atmosphere

• Nitrogen in the atmosphere

Tags

NGSS.MS-LS2-3