Nitrogen Cycle Flashcards Preview

Uncategorized > Nitrogen Cycle > Flashcards

Flashcards in Nitrogen Cycle Deck (2)
Loading flashcards...
1
Q

what does a diagram of the nitrogen cycle show

A

how the element nitrogen moves between living organisms and the environment.

2
Q

how is nitrogen recycled

A

a nitrogen gas in the air cannot be used directly by plants and animals b nitrogen-fixing bacteria living in root nodules or the soil can fix nitrogen gas c the action of lightning can convert nitrogen gas into nitrates d decomposers break down dead animals and plants e soil bacteria convert proteins and urea into ammonia f nitrifying bacteria convert this ammonia to nitrates g plants absorb nitrates from the soil h nitrates are needed by plants to make proteins for growth i nitrogen compounds pass along a food chain or web j denitrifying bacteria convert nitrates to nitrogen gas