The Nitrogen Cycle
An educational worksheet for 6th graders to learn about the nitrogen cycle, its stages, and its importance to living organisms.
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The Nitrogen Cycle
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Read the questions carefully and answer to the best of your knowledge. Refer to the diagram of the Nitrogen Cycle as needed.
The Nitrogen Cycle
1. The atmosphere is made up of about 78% gas.
2. Plants cannot directly use nitrogen gas from the atmosphere; it must first be converted into usable forms by a process called .
3. are tiny organisms that play a crucial role in converting nitrogen into forms that plants can absorb.
4. When plants and animals die, decomposers return nitrogen to the soil through a process called .
5. Which of the following is NOT a stage of the nitrogen cycle?
Nitrogen Fixation
Photosynthesis
Denitrification
Nitrification
6. How do animals obtain nitrogen?
By breathing it from the air
By absorbing it through their skin
By eating plants or other animals
By drinking water
7. Nitrogen is an important component of DNA and proteins.
True
False
8. Lightning can convert atmospheric nitrogen into usable forms.
True
False
9. Briefly explain why the nitrogen cycle is important for all living things.
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