AnswersSC332 Environmental Science BMinerals and Mining

Minerals and Mining — Unit test Answers

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Why might soils rich in organic matter not be fertile?

A
Soil fertility comes from a balance of organic matter and other mineral nutrients.
B
Large amounts of organic material make soil retain too little water.
C
Soil fertility is a result of the inorganic minerals present.
D
Soils rich in organic material are always highly fertile.
2
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What percent of the trees cut down are used for something other than paper?

A
35%
B
45%
C
55%
D
65%
3

Which of the following is an example of a nonmetallic mineral?

A
sulfur
B
lead
C
aluminum
D
gold
4

Which type of mining is likely the least harmful to the environment?

A
surface mining
B
placer mining
C
subsurface mining
D
none of the above
5

Salinization increases the concentration of _______ in soil.

A
plants
B
nutrients
C
salt
D
water
6

How do trees improve water quality?

A
Tree roots anchor soil in place, preventing runoff.
B
Water is filtered as it passes through the root systems of trees.
C
An adult tree can store nearly 250 gallons of water.
D
All of the above
7

Which of the following is the most damaging method of soil remediation?

A
soil excavation and disposal
B
soil aeration
C
heating and vapor extraction
D
microbial digestion
8

Which of the following best explains why clear-cutting forests is more destructive than selectively cutting down trees in forests?

A
Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native animals.
B
Clear-cutting places the land at greater risk for wildfires.
C
Clear-cutting makes land more attractive for human development.
D
Clear-cutting causes less soil erosion than selective cutting.
9

How can zoning laws be beneficial to a city’s residents?

A
They prevent new business development.
B
They can prevent new development that would harm established residents.
C
They limit the maximum height of buildings.
D
They restrict who can live in a city.
10

Which of the following best describes the uses of private land?

A
Private land cannot be used to operate businesses.
B
After initial construction. the uses of private land do not change.
C
It can be used for a variety of activities and businesses.
D
None of the above.
11

Biological pest control involves _______.

A
eliminating pests with pesticides
B
using biological mechanisms to eliminate pests
C
planting a new crop every year
D
burning crops
12

Which of the following cities has experienced more upward growth than urban sprawl?

A
Los Angeles, California
B
Bangkok, Thailand
C
Tokyo, Japan
D
Jakarta, Indonesia
13

Which of the following regions has the highest population living in rural areas?

A
Asia
B
Africa
C
North America
D
Europe
14

Rainforests are not exclusively found near the equator.

A
T
B
F
15

The promotion of companies’ sustainably harvested rainforest products is intended to _______.

A
produce cheaper products
B
promote overconsumption
C
give the company a competitive advantage
D
produce more expensive products

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