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Science
Nitrogen Cycle
Quiz 2
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Q.1
This can transform nitrogen in the atmosphere into a usable form of nitrogen
rain
ice
lightning
sun
Q.2
The process in which nitrogen circulates and is recycled is called
The nitrogen cycle
The carbon cycle
The water cycle
The phosphorus cycle
Q.3
_____ is the conversion of organic nitrogen into ammonia
Nitrogen Fixation
Ammonification
Denitrification
Assimilation
Q.4
Majority of nitrogen fixation occurs by
Biological nitrogen fixing organisms
Lightning
volcanic eruptions
Haber–Bosch process
Q.5
How nitrogen is "fixed" into useable form for plants...
through action of bacteria only
through lightning only
through action of bacteria & lightning
through photosynthesis
Q.6
We need nitrogen to make
proteins
enzymes
cells
all of these
Q.7
What is the role of decomposing bacteria in the nitrogen cycle?
change Nitrogen gas into Nitrate
Return the nitrogen compounds to the soil
Turn nitrogen into water
Turn nitrate into nitrogen gas
Q.8
True or False. The nitrogen in the atmosphere is in the right form for living things to use.
True
False
Q.9
What % of the air is made of nitrogen?
21%
52%
61%
78%
Q.10
If the atmosphere isNwhy can't we just get our nitrogen by breathing?
We have no mechanism to break the triple bond of nitrogen between the atoms.
Our lungs would be damaged by the N2.
We need Oxygen for cellular respiration.
The legumes take it up first.
Q.11
After plants and animals contain nitrogen, what puts it back into atmosphere and soil?
decomposition
precipitation
condensation
bacteria
Q.12
All plants have nitrogen fixing bacteria in their roots.
True
False
Q.13
Bacteria create a form of nitrogen that animals can use directly.
True
False
Q.14
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
Q.15
The process that allows organisms to use nitrogen
assimilation
denitrification
fixation
ammonification
Q.16
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
Q.17
How is nitrogen "fixed" into a usable form for plants?
Through action of bacteria only
Through lightning only
Through action of bacteria and lightning
Through photosynthesis
Q.18
Nitrification happens in the ______
Air
Soil
Ground Water
Plants
Q.19
Organisms that play a role in the nitrogen cycle
only plants
only animals
only bacteria
plants, animals, & bacteria
Q.20
Plants and animals cannot use nitrogen directly from the air.
True
False
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