AnswersIC Environmental Science - DeeringThe Importance of Trees

Changing Waterways Answers

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1
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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
2
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Recreational activities can cause an increase in erosion rates.

A
T
B
F
3

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
4

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

A
T
B
F
5

Increased awareness of water contamination can help reduce its effects.

A
T
B
F
6

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

A
T
B
F
7

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.
8

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
9

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.
10

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
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 is a source of water pollution?

A
sewage
B
oil spills
C
fertilizers
D
all of the above
13

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.
14

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
15

Over time, most lakes grow larger due to erosion.

A
T
B
F
16

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.
17

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

A
T
B
F
18

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.
19

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.
20

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

A
T
B
F

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