AnswersSC332 Environmental Science BThe Water We Use

Changing Waterways Answers

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1
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How is thermohaline circulation influenced by salinity and temperature?

A
It is driven by density gradients, which are affected by salinity and temperature, with cold water and water with higher salt concentrations being more dense.
B
It is driven by density gradients, which are affected by salinity and temperature, with warm water and water with higher salt concentrations being more dense.
C
It is driven by density gradients, which are affected by salinity and temperature, with warm water and water with lower salt concentrations being more dense.
D
It is driven by density gradients, which are affected by salinity and temperature, with cold water and water with lower salt concentrations being more dense.
2
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Which of the following is an effect of fossil fuel emission on oceans?

A
decreased pH
B
decreased carbonate concentrations
C
increased CO2 absorption
D
all of the above
3

Recreational activities can cause an increase in erosion rates.

A
T
B
F
4

Which of the following practices could help reduce erosion of water banks?

A
buffer strips
B
natural fertilizers and pesticides
C
decrease in fossil fuel emissions
D
all of the above
5

Increased awareness of water contamination can help reduce its effects.

A
T
B
F
6

How does flooding affect rivers?

A
It causes river bends to be cut off.
B
It picks up deposits from floodplains.
C
It causes rivers to divert.
D
It causes river channels to change shape.
7

How does pollution affect marine life?

A
Pollution causes a decrease in phytoplankton populations and therefore a decrease in the occurrence of algal blooms.
B
Pollution causes destruction of coral reefs, which are important sources of shelter and breeding for marine animals.
C
Soaps, detergents, and plastics in the ocean decrease the acidity of ocean water, leading to a decrease in carbonate levels.
D
Pollution affects organisms close to the shoreline, but does not affect marine organisms far from the shore.
8

How is an oxbow lake formed?

A
An oxbow lake is formed when a lake shrinks due to erosion.
B
An oxbow lake is formed when the wide bend of a river is cut off.
C
An oxbow lake is formed when high concentrations of salt are present in lakes.
D
An oxbow lake is formed when a dam or levee is built on a river.
9

Over time, most lakes grow larger due to erosion.

A
T
B
F
10

Flooding on rivers is caused by human activity rather than natural events.

A
T
B
F

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