Nitrogen Cycle Review

• Nitrification

• Nitrogen fixation

• Denitrification

• Ammonification

What is the primary role of nitrifying bacteria in the nitrogen cycle?

• Convert ammonia into nitrogen gas

• Convert ammonia into nitrites and nitrates

• Convert nitrates into ammonia

• Fix atmospheric nitrogen

Denitrification is an important process in ecosystems because it:

• Converts ammonia into nitrites

• Releases nitrogen gas back into the atmosphere

• Fixes atmospheric nitrogen into organic compounds

• Converts nitrates into ammonia

Tags

NGSS.MS-LS2-3

Which type of bacteria is primarily responsible for nitrogen fixation in the soil?

• Nitrifying bacteria

• Denitrifying bacteria

• Nitrogen-fixing bacteria

• Ammonifying bacteria

Tags

NGSS.MS-LS2-3

Which of the following is a product of the denitrification process?

Tags

NGSS.MS-LS2-3

How do nitrogen-fixing bacteria benefit plants?

• By converting nitrates into ammonia

• By converting atmospheric nitrogen into a form plants can use

• By releasing nitrogen gas into the atmosphere

• By decomposing organic matter

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following processes is essential for returning nitrogen to the atmosphere?

• Nitrification

• Nitrogen fixation

• Denitrification

• Ammonification

Which of the following is a key step in the nitrogen cycle that involves the conversion of nitrates into nitrogen gas?

• Nitrogen fixation

• Nitrification

• Denitrification

• Ammonification

In the nitrogen cycle, which process is responsible for converting nitrogen gas into a form usable by plants?

• Nitrification

• Denitrification

• Nitrogen fixation

• Ammonification

Tags

NGSS.MS-LS2-3

Which of the following processes is crucial for the conversion of ammonia into nitrites and nitrates in the soil?

• Nitrogen fixation

• Nitrification

• Denitrification

• Ammonification