nitrogen cycle
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
The natural process by which nitrogen moves between the atmosphere, soil and living organisms in different chemical forms.
Test yourself
Which word fits the gap? "Bacteria play a crucial role in the _____ by converting nitrogen gas into forms that plants can actually use."
Answer: nitrogen cycle
In your own words, what does "nitrogen cycle" mean?
The natural process by which nitrogen moves between the atmosphere, soil and living organisms in different chemical forms.
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