HEL

Drag the tiles to the correct boxes to complete the pairs.

Match each step in the nitrogen cycle to its description.

bacteria convert atmospheric

nitrogen to ammonia

bacteria break down waste

products and return nitrogen

to the soil

bacteria convert ammonia

to nitrites and nitrates

bacteria convert nitrates

into nitrogen gas

plants and animals take in

and use nitrogen compounds

assimilation

denitrification

nitrification

ammonification

nitrogen fixation