Nitrogen cycle

Flashcard
•
Biology
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the nitrogen cycle?
Back
The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms in the environment, including the atmosphere, soil, and living organisms.
2.
FLASHCARD QUESTION
Front
What role do plants play in the nitrogen cycle?
Back
Plants absorb nitrogen from the soil in the form of nitrates and ammonium, which they use to synthesize proteins essential for growth.
3.
FLASHCARD QUESTION
Front
How do animals obtain nitrogen?
Back
Animals obtain nitrogen by consuming plants or other animals that have already incorporated nitrogen into their bodies.
4.
FLASHCARD QUESTION
Front
What is nitrogen fixation?
Back
Nitrogen fixation is the process by which certain bacteria convert nitrogen gas from the atmosphere into ammonia or related compounds that plants can use.
5.
FLASHCARD QUESTION
Front
What is denitrification?
Back
Denitrification is the process by which bacteria convert nitrates back into nitrogen gas, returning it to the atmosphere and completing the nitrogen cycle.
6.
FLASHCARD QUESTION
Front
What is an algae bloom?
Back
An algae bloom is a rapid increase in the population of algae in water bodies, often caused by excess nutrients like nitrogen, leading to negative environmental impacts.
7.
FLASHCARD QUESTION
Front
What happens to the nitrogen cycle if bacteria are eliminated?
Back
If bacteria are eliminated, the nitrogen cycle would stop because bacteria are essential for processes like nitrogen fixation and denitrification.
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