AnswersSNHS NV-Environmental ScienceWhat Are Natural Resources?

What Are Natural Resources? — Unit test Answers

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1
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Which of the following properties of soil has the greatest effect on plant and microorganism growth?

A
soil texture
B
soil color
C
soil reaction
D
soil consistency
2
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Water would be considered a(n) _______.

A
potential renewable resource
B
potential nonrenewable resource
C
actual renewable resource
D
actual nonrenewable resource
3

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
4

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
5

Which of the following is least likely to have difficulties with economic access to potable water?

A
Zimbabwe
B
Australia
C
India
D
None of the above
6

The La Brea Tar Pits are _______.

A
a valuable source of petroleum
B
filled with tar made from mammals
C
filled with asphalt
D
a and b only
7

How do organic farming practices relate to soil health?

A
Organic farmers rely on soil health for good crop production.
B
Organic farmers rely on the interaction between soil microbes and organic matter.
C
Organic farmers avoid the use of pesticides and chemicals.
D
all of the above
8

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.
9

The use of buffer strips can help reduce human impacts on waterways.

A
T
B
F
10

Which layer of soil is least likely to be penetrated by plant roots?

A
O (organic matter)
B
A (topsoil)
C
B (subsoil)
D
C (parent rock)
11

How do trees interact with other organisms?

A
They provide mammals with food.
B
They receive shelter from insects.
C
They obtain food from other plants.
D
All of the above
12

Soil composition is not subject to change.

A
T
B
F
13

The defining characteristic of potable water is that it _______.

A
is used as tap water
B
can be used for washing and irrigation
C
can be used and consumed without risk
D
is delivered through pipes
14

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.
15

Which of the following is not an effect of erosion on lakes?

A
water leakage
B
wearing away of sides
C
increased water levels
D
basin filling with sediment

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