Unit Test — Unit test Answers

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1
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Which action has a positive effect on air resources?

A
using fossil fuels
B
building new homes
C
walking to work or school
D
removing vegetation such as trees
2
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Which is a cause of desertification?

A
farming
B
creating reservoirs
C
overgrazing
D
driving motor vehicles
3

Which is one source that scientists use to reconstruct past climate conditions?

A
fossils frozen in glaciers
B
daily temperatures
C
the tilt of Earth’s axis
D
running water
4

Which is a negative effect of rising ocean temperatures?

A
the drying out of fertile land and the formation of dust bowls
B
the flooding of low-lying coastal areas
C
the faster evaporation of water in the soil
D
the decreased frequency of major storms
5

Which is a natural factor that causes long-term climate change?

A
Earth’s position
B
pollen grains
C
fossils
D
ice cores
6

Which correctly lists the three weather factors that are indicators of climate change?

A
sunsets, wind patterns, clouds
B
ocean currents, ice cores, temperature
C
temperature, wind patterns, ice cores
D
wind patterns, temperature, ocean currents
7

Which correctly lists the three land uses that the Bureau of Land Management was originally created to manage?

A
mining, recreation, wildlife refuges
B
recreation, developing oil and gas, battlefields
C
grazing, mining, developing oil and gas
D
developing oil and gas, battlefields, wildlife refuges
8

Red wolves are an endangered species in the United States. Which agency is responsible for their protection?

A
National Park Service
B
US Fish and Wildlife Service
C
US Forest Service
D
Bureau of Land Management
9

Which is one way that analyzing ice benefits scientists who study ancient climates?

A
Scientists can analyze frozen volcanic dust to help predict eruptions.
B
Scientists can study the layers of ice cores to gather information about past atmospheric composition.
C
Scientists can use sand grains in ice to make inferences about the climate area.
D
Scientists can study tree rings in ice to learn more about past climates.
10

Which action destroys topsoil?

A
mowing land
B
adding nutrients to soil
C
plowing land without replanting
D
sowing seeds in land
11

Which describes one characteristic of both El Niño and La Niña?

A
Both are causes of long-term climate change.
B
Both create warmer water.
C
Both occur in the Pacific Ocean.
D
Both are causes of hurricane activity.
12

Which could cause topsoil to be lost?

A
wind and water erosion
B
lack of use
C
compaction
D
desertification
13

Which describes an effect that ocean currents have on short-term climate change?

A
Ocean currents increase the strength of prevailing winds, which can cool the air and land.
B
Ocean currents can carry cold water, which can cool the air and land.
C
Ocean currents increase hurricane activity, which can raise the temperature of the air and land.
D
Ocean currents carry cold water, which may not affect hurricane activity and lower the temperature of the air and land.
14

Which is a possible consequence of decreasing air quality resulting from global warming?

A
drying out of fertile lands
B
flooding of low-lying coastal areas
C
melting of glaciers and polar ice caps
D
decrease in population due to health threats
15

Which is an issue that governments must consider before passing conservation policies?

A
urbanization implications
B
cost to implement conservation policies
C
desertification implications
D
cost to implement deforestation

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