Nitrogen Cycle Worksheet
A Grade 7 science worksheet covering the key stages and components of the nitrogen cycle.
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Nitrogen Cycle Worksheet
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Read each question carefully and answer to the best of your ability. Use the provided diagram to help you.
1. The atmosphere is about 78% gas.
2. is the process where nitrogen gas from the atmosphere is converted into ammonia by bacteria.
3. Plants absorb nitrogen compounds from the soil through their .
4. The process of converting nitrates back into nitrogen gas, which is then released into the atmosphere, is called .
1. Which of the following organisms plays a crucial role in nitrogen fixation?
Fungi
Bacteria
Animals
Algae
2. How do animals obtain nitrogen?
By breathing it from the air
By absorbing it from water
By eating plants or other animals
By photosynthesis
1. Lightning can convert atmospheric nitrogen into usable forms for plants.
True
False
2. Nitrogen is a component of DNA and proteins.
True
False
1. Briefly explain why nitrogen is essential for living organisms.
2. Describe one way human activities impact the nitrogen cycle.