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WorksheetsNitrogen Cycle Quick Review
Total questions: 10
Worksheet time: 5mins
Why is nitrogen so important to living things?
(Choose 2)
It's in carbohydrates
It's in fat
It's in protein
It's in DNA
If you were a nitrogen atom and were allowed to keep going, would your journey ever end?
yes
no
What percentage of Earth's atmosphere is Nitrogen?
10%
27%
95%
78%
Can we use the nitrogen in the air?
Yes
No
Which process changes nitrogen (in the air) into usable nitrogen in the soil?
(Think of nitrogen in the air as BROKEN)
Nitrification
Decay
Fixation
Synthesis
How do plants get nitrogen?
They absorb it through their roots (from the soil)
They get it from the air
They get it through their leaves
They get it from the sun
How do animals get nitrogen?
breath it in
eat plants or other animals
absorb it from the soil
it's magic
Which process allows nitrogen in dead plants and animals to be returned to the soil?
fixation
denitrification
decomposition
synthesis
Which of these is NOT a way that nitrogen is fixed?
Bacteria
Forest Fires
Lightning
Eaten by animals
When do animals lose nitrogen?
When they poop or die
When they breathe out
When they are hit by lightning
When they drink water
