Biogeochemical Cycles in Ecosystems Answers

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Why are bacteria needed in the nitrogen cycle?

A
Other living things cannot use atmospheric nitrogen.
B
Other living things cannot use the nitrogen in plants.
C
Bacteria are the main nitrogen reservoir.
D
Bacteria convert nitrogen gas into oxygen.
4

Which disruption in the water cycle would most likely affect photosynthesis?

A
heat causing an excess of transpiration
B
heat causing an excess of evaporation
C
heat causing an excess of condensation
D
heat causing an excess of precipitation
6

Which process plays an important role in the cycling of both carbon and nitrogen?

A
photosynthesis
B
transpiration
C
decomposition
D
respiration
7

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

A
the geosphere
B
the atmosphere
C
the hydrosphere
D
the biosphere
8

Which statements describe characteristics of Earth's geosphere? Select three options.It is made up of living things.It is mostly solid.It includes liquid water.It includes Earth's surface.It includes Earth's interior.It is made up of gases and airborne particles.

A
It is made up of living things.
B
It is mostly solid.
C
It includes liquid water.
D
It includes Earth's surface.
E
It includes Earth's interior.
F
It is made up of gases and airborne particles.
9

Why are plants important to the carbon cycle?

A
Plants remove carbon from the soil to help them convert nitrogen to a usable form.
B
Plants remove carbon from the atmosphere to help them convert nitrogen to a usable form.
C
Plants remove carbon from the soil to help them make glucose.
D
Plants remove carbon from the atmosphere to help them make glucose.

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