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- Multiple ChoicePlease save your changes before editing any questions.
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
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The process in which nitrogen circulates and is recycled is called
The nitrogen cycle
The carbon cycle
The water cycle
The phosphorus cycle
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Organisms that need nitrogen to survive.
only plants
only animals
only bacteria
all living things
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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
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How do animals get the nitrogen they need?
From the air they breathe
From the water they drink
From the food they eat
From the sun
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Gas that makes up 78% of our atmosphere.
Oxygen
Nitrogen
Hydrogen
Carbon Dioxide
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What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
nitrogen composition
nitrogen fixation
ammonia
denitrification
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What is the formula for atmospheric nitrogen?
N
N2
NH3
NO3
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What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
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Plants and animals cannot use nitrogen directly from the air.
True
False
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According to this diagram, plants use nitrogen to make _________________________
bacteria
animals
proteins
decomposers
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According to this diagram, plants absorb
nitrates
nitrogen fixing bacteria
animals
decomposers
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According to this diagram, animals get proteins from eating ________________________
decomposers
bacteria
plants
sunlight
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The process that allows organisms to use nitrogen
assimilation
denitrification
fixation
ammonification
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A correct path that nitrogen could take would be
air -> animals -> plants -> bacteria
animals -> air -> bacteria -> plants
bacteria -> air -> plants -> animals
air -> bacteria -> plants -> animals
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Bacteria fix nitrogen from the atmosphere into a form plants can use.
True
False
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Bacteria create a form of nitrogen that animals can use directly.
True
False
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What do free living bacteria in the soil do?
Make clouds
Turn atmospheric nitrogen into nitrates
Make carbon dioxide for plants to go through photosynthesis
Help plants take in water
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In the nitrogen cycle, what does label A in the diagram represent?
Gas
Clouds
Carbon dioxide in the atmosphere
Nitrogen in the atmosphere
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All plants have nitrogen fixing bacteria in their roots.
True
False