Nitrogen Cycle Lesson

N0_{3 is also known as} 

• ammonia
• nitrite
• nitrogen
• nitrate

Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

Tags

NGSS.MS-LS2-3

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

During _____________, nitrogen from dead animals and waste is converted into ammonia. 

• Nitrogen Fixation
• Ammonification
• Denitrification
• Assimilation 

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

• nitrogen composition
• ammonia 
• nitrogen fixation
• denitrification

Which of the following are nitrogen "fixers"

• rabbits
• bacteria and lightning
• decaying matter
• ammonifiers 

During _________, plants absorb nitrogen.

• nitrification
• dentrification
• assimilation
• ammonification

Plants can assimilate or absorb this type of nitrogen...?

• N₂
• NH₃
• N0₃
• Atmospheric nitrogen

Ammonia is converted to nitrite then nitrate in a process known as...?

• assimilation
• denitrifcation
• nitrification
• assimilation

The nitrogen in the atmosphere can be readily absorbed by plants. 

• True
• False