The Cycles of Matter Answers

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Which of the following would be a result of eutrophication of a lake?

A
undergrowth of water plants
B
hypoxia, or low levels of oxygen
C
decreased decomposition
D
inactivity of fertilizers
4

Which statement best describes a human influence on the biogeochemical cycles?

A
increased eutrophication caused by high levels of nitrogen and phosphorous
B
increased nitrates available due to inaccurate methods of denitrification
C
increased global warming due to alternative energy sources
D
increased amount of water that is available to freshwater ecosystems
5

What would happen if there were no condensation stage in the water cycle?

A
Water could not convert from a gas to a liquid.
B
Water could not convert from a liquid to a gas.
C
Water could not convert from transpiration to evaporation.
D
Water could not convert from precipitation to evaporation.
7

The phosphorus cycle differs from the biogeochemical cycles in that

A
it does not have an atmospheric reservoir.
B
it does not have an oceanic reservoir.
C
there is no assimilation of phosphorus.
D
there is no decomposition of phosphorus.
9

What is the effect of the biogeochemical cycles?

A
cycling energy through a food chain
B
recycling matter through the biosphere
C
recycling rocks through the layers of Earth
D
cycling nutrients through the human body
10

Which best describes a possible negative impact of irrigation of farmland?

A
Food can be produced in dry areas.
B
Increased runoff can pollute bodies of water.
C
Food can be produced through drought years.
D
Water can improve the livelihood of farmers.

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