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Nitrogen cycle quiz

Last updated over 2 years ago

12 questions

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Question 1

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Question 2

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Question 3

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Question 4

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Question 5

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Question 6

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Question 7

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Question 8

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Question 9

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Question 10

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Question 11

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Question 12

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Nitrogen is a gas that makes up nearly 80% of Earth's atmosphere.

True

False

Nitrogen is a key component of proteins and DNA.

True

False

Nitrogen can be directly absorbed by plants from the atmosphere.

True

False

Nitrogen is converted into a usable form by lightning.

True

False

What is the main reservoir of nitrogen in the nitrogen cycle?

Soil

Atmosphere

Animals

Plants

What process converts atmospheric nitrogen into usable nitrogen compounds?

Nitrification

Denitrification

Nitrogen fixation

Assimilation

What process returns nitrogen back to the atmosphere?

Denitrification

Ammonification

Assimilation

Nitrification

What is the primary source of energy for nitrogen fixation?

Lightning

Photosynthesis

Respiration

Decomposition

What are the different forms of nitrogen found in the environment?

Nitrates

Proteins

Ammonium

N2

Water bodies

Living organisms

Soil

Atmosphere

Which processes contribute to the nitrogen cycle?

Ammonium to nitrite to nitrate

Nitrate to nitrogen gas

Incorporation of nitrogen into organic molecules

Bacteria

Nitrification

Denitrification

Assimilation

Nitrogen fixation

Where do nitrogen-fixing bacteria live?

Rizobium

Azotobacter

Cyanobacteria

Diazotrophs

Root nodules of legume plants

Soil

Wetlands

Marine environments

What is the role of denitrifying bacteria in the nitrogen cycle?

Use nitrate instead of oxygen for respiration

Nitrate to nitrogen gas

Create an oxygen-low environment

Energy source

Reduce

Anaerobic conditions