AnswersIC Sem B Environmental SystemsChanging Waterways

Changing Waterways Answers

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1
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Over time, most lakes grow larger due to erosion.

A
T
B
F
2
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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.
3

Reducing access to waterways will lead to an increase in human impact on waterways.

A
T
B
F
4

Increased awareness of water contamination can help reduce its effects.

A
T
B
F
5

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
6

Which of the following does not represent an impact of recreational activity on springs?

A
destruction of native vegetation
B
wildlife disruption
C
decreased soil erosion
D
water pollution
7

How can alternative practices lead to a reduced impact on waterways?

A
Alternative practices will completely eliminate changes to waterways.
B
Alternative practices can completely reverse the damage already done to waterways.
C
Alternative practices will allow industry greater access to waterways.
D
Alternative practices can lead to a decrease in pollution, erosion, and damage to waterways.
8

Which of the following is a source of water pollution?

A
sewage
B
oil spills
C
fertilizers
D
all of the above
9

How does the loss of vegetation on shore lines affect waterways?

A
decreased sedimentation
B
increased shorelines
C
increased erosion of water banks
D
none of the above
10

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

A
T
B
F
11

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.
12

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
13

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.
14

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.
15

Which of the following methods would help decrease marine pollution?

A
government regulation of agriculture
B
government regulation of industry
C
reduction in chemical use
D
all of the above
16

The majority of the debris found in the garbage patch is _______.

A
large plastic bottles
B
sewage
C
trash from landfills
D
small pieces of plastic
17

Recreational activities can cause an increase in erosion rates.

A
T
B
F

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