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Biogeochemical Cycles in Ecosystems — Quiz Answers

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1
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Which two processes allow water to enter the atmosphere?

A
condensation and evaporation
B
evaporation and transpiration
C
precipitation and condensation
D
transpiration and precipitation
4

Why are bacteria needed in the nitrogen cycle?

A
Other living things cannot use atmospheric nitrogen.
B
Bacteria convert nitrogen gas into oxygen.
C
Other living things cannot use the nitrogen in plants.
D
Bacteria are the main nitrogen reservoir.
5

Which is the sphere that refers to the Earth’s water?

A
the geosphere
B
the atmosphere
C
the biosphere
D
the hydrosphere
6

Which statements describe characteristics of Earth's geosphere? Choose three correct answers.

A
It includes Earth's surface.
B
It is made up of gases and airborne particles.
C
It is mostly solid.
D
It includes Earth's interior.
E
It includes liquid water.
F
It is made up of living things.
8

How do animals get nitrogen?

A
They convert carbon to nitrogen during fixation.
B
They break down glucose molecules into nitrogen.
C
They eat it in plants and other animals.
D
They breathe it in from the atmosphere.
9

What protects Earth's surface?

A
the hydrosphere
B
the atmosphere
C
the geosphere
D
the biosphere

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Biogeochemical Cycles in Ecosystems — Quiz…