Nitrogen Cycle

What is the process called where nitrogen in the soil can be liberated back into the atmosphere?

• Denitrification

• Nitrogen fixation

• Ammonification

• Nitrification

• Assimilation

What is the process called where decomposers turn nitrogen compounds into ammonia?

• Denitrification

• Nitrogen fixation

• Ammonification

• Nitrification

• Assimilation

What is the process called where plants take up nitrates from the soil?

• Denitrification

• Nitrogen fixation

• Ammonification

• Nitrification

• Assimilation

What is the process called where bacteria convert ammonia into usable nitrates?

• Denitrification

• Nitrogen fixation

• Ammonification

• Nitrification

• Assimilation

What is the process called where bacteria take nitrogen out of the atmosphere and convert it into usable nitrates?

• Denitrification

• Nitrogen fixation

• Ammonification

• Nitrification

• Assimilation

What nitrogen compounds do decomposers produce?

• Nitrites

• Nitrates

• Nitrogen

• Ammonia

Which of the following are nitrogen fixing? (2)

• Decomposing

• Lightning

• Volcanoes

• Blue green algae

• Plants

Which of the following describes assimilation?

• Uptake of nitrates by plants

• Bacteria taking nitrogen out of the atmosphere

• Bacteria returning nitrogen to the atmosphere

• Bacteria turning ammonia into nitrates

I turn unusable ammonia into usable nitrates. Who am I?

• Nitrogen fixing bacteria

• Denitrifying bacteria

• Nitrifying bacteria

• Ammonifying bacteria

I help nitrogen trapped in the soil escape from 'organic slavery'! Who am I?

• Denitrifying bacteria

• Nitrifying bacteria

• Nitrogen fixing bacteria

• Decomposing bacteria