WorksheetsBiogeochemical cycle
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
During which phase of the nitrogen cycle do decomposers break down nitrates into ammonium?
a)
Ammonification
b)
Nitrification
c)
Denitrification
d)
Assimilation
2.
Which of the following organisms plays a major role in all phases of the nitrogen cycle?
a)
Bacteria
b)
Fungi
c)
Plants
d)
Animals
3.
During which phase of the nitrogen cycle do bacteria and lightning strikes convert atmospheric nitrogen into a usable form?
a)
Ammonification
b)
Assimilation
c)
Nitrogen Fixation
d)
Nitrification
4.
During which phase of the nitrogen cycle is ammonia converted into nitrates?
a)
Ammonification
b)
Nitrification
c)
Nitrogen fixation
d)
Denitrification
5.
During which phase of the nitrogen cycle is nitrogen gas returned to the atmosphere?
a)
Ammonification
b)
Nitrogen fixation
c)
Nitrification
d)
Denitrification
6.
During which phase of the nitrogen cycle are nitrates taken up into plant roots?
a)
Ammonification
b)
Assimilation
c)
Nitrificaiton
d)
Denitrification
7.
Which two biological processes play a role in cycling carbon and oxygen?
a)
Photosynthesis and Transpiration
b)
Cellular Respiration and Evaporation
c)
Photosynthesis and Cellular Respiration
d)
Transpiration and Evaporation
8.
By which of the following processes is carbon dioxide removed from the atmosphere?
a)
Cellular respiration
b)
Decomposition
c)
Combustion
d)
Photosynthesis
9.
Which of the following does NOT add carbon dioxide to the atmosphere?
a)
Burning fossil fuels
b)
Decomposition of plants and animals
c)
Cellular respiration
d)
Transpiration
10.
Photosynthesis is an important part of the ______ cycle
a)
Carbon
b)
Water
c)
Phosphorus
d)
Nitrogen
11.
Phosphorus is a greenhouse gas
a)
true
b)
false
12.
How is carbon stored on earth?
a)
Burning fossil fuels
b)
Underground in the form of fossil fuels
c)
Erupting Volcanoes
13.
The movements of energy and nutrients through living systems are different because
a)
energy flows in one direction, and nutrients recycle.
b)
energy is limited in the biosphere, and nutrients are always available.
c)
nutrients flow in one direction, and energy recycles.
d)
energy forms chemical compounds, and nutrients are lost as heat.
14.
A biogeochemical cycle explains:
a)
The formation of stars and planets.
b)
why certain animals are known as keystone animals.
c)
the flow of chemical elements between living organisms and the environment.
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