Nitrogen Cycle in the Environment
7th Grade•45 minutes
Learning Objective
I can describe how nitrogen moves through the environment.
Key Concepts
The nitrogen cycle is a nutrient cycle where nitrogen is reused and recycled in ecosystems.
Nitrogen-fixing bacteria convert nitrogen gas into ammonia, which plants can use.
Denitrifying bacteria convert nitrates back into nitrogen gas, completing the cycle.
Practice Questions
This lesson includes 10 practice questions to reinforce learning.
View questions preview
1. Why is nitrogen important for life on Earth?
2. What percentage of the Earth's atmosphere is made up of nitrogen gas (N2)?
3. Explain why plants cannot directly use nitrogen gas (N2) from the atmosphere.
...and 7 more questions
Educational Video
The Nitrogen Cycle!
BioMan Biology