Nitrogen Cycle

Which nitrogen cycle process is occurring when nitrogen in plant or animal protein is converted to ammonium?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

When deciduous trees shed their leaves, specialized soil bacterial will consume the leaf material for energy and, in the process, will return some of the leaf nitrogen to the soil. What nitrogen cycle process is taking place?

• nitrogen fixation

• nitrification

• denitrification

• ammonification

• assimilation

Tags

NGSS.MS-LS2-3

Which of these nitrogen molecules would be present in the atmosphere?

• NH₃

• NH₄⁺

• NO₃^-

• N₂

What is the process where plants use nitrates to grow?

• Nitrogen Fixation

• Ammonification

• Assimilation

• Nitrification

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What is the process where bacteria turns Nitrogen gas from the atmospheres into usable compounds?

• nitrogen composition

• nitrogen fixation

• ammonia

• denitrification

Tags

NGSS.MS-LS2-3

_____ is the conversion of organic nitrogen into ammonia

• Nitrogen Fixation

• Ammonification

• Denitrification

• Assimilation

Tags

NGSS.MS-LS2-3

Organisms that play a role in the nitrogen cycle

• only plants

• only animals

• only bacteria

• plants, animals, & bacteria

Tags

NGSS.MS-LS2-3

The process that convert nitrates (NO3-) back to nitrogen gas (N2) there by replenishing N2 in the atmosphere is called

• Nitrogen fixation

• Deamination

• Denitrification

• Nitrification

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

What happens when organisms die and decay? 

• Their bodies are lifted up

• Their nitrogen returns to the soil

• they keep their nitrogen

• They stay on earth forever

Tags

NGSS.MS-LS2-3

Nitrification happens in the ______

• Air 

• Soil 

• Ground Water 

• Plants 

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4