Nitrogen Cycle Summative

Which process in the nitrogen cycle involves the conversion of atmospheric nitrogen into a form usable by plants?

• Ammonification

• Nitrogen fixation

• Nitrification

• Assimilation

Which type of bacteria is responsible for converting atmospheric nitrogen (N₂) into a form that plants can use?

• Nitrifying bacteria

• Denitrifying bacteria

• Nitrogen-fixing bacteria

• Ammonifying bacteria

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

What is the first product formed when ammonia (NH₃) undergoes nitrification?

• Nitrates (NO₃⁻)

• Nitrogen gas (N₂)

• Nitrites (NO₂⁻)

• Ammonia (NH₃)

Tags

NGSS.MS-LS2-3

Which process involves the uptake of nitrates by plants to form organic nitrogen compounds?

• Denitrification

• Assimilation

• Ammonification

• Nitrogen fixation

Which process involves the breakdown of organic nitrogen compounds into ammonia?

• Conversion of ammonia into nitrites

• Release of nitrogen gas into the atmosphere

• Decomposition of organic matter into ammonia

• Absorption of nitrates by plants

Which type of bacteria is responsible for converting nitrates into nitrogen gas in the nitrogen cycle?

• Nitrifying bacteria

• Denitrifying bacteria

• Nitrogen-fixing bacteria

• Ammonifying bacteria

Which process in the nitrogen cycle converts nitrates back into nitrogen gas?

• Nitrification

• Ammonification

• Assimilation

• Denitrification