AnswersOC27 EarthSpace Sci-2001310-S1-NelsonUnit Test

Unit 4: Test Answers

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22
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What leads to the formation of a windchill factor?

A
Earth’s rotation influences air movement along a curved path.
B
Air flows steadily from different directions at certain wind speeds.
C
Warm air rises when an area of high pressure is present over land.
D
There is a change in air temperature and increase in high wind speeds.
23
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Which statement best describes wavelengths of sunlight that are longer than 700 nanometers?

A
These wavelengths form the infrared part of the spectrum.
B
These wavelengths form the ultraviolet light of the spectrum.
C
These wavelengths are shorter than the wavelengths of visible light.
D
These wavelengths are part of the visible light spectrum.
24

Which of the following actions would a person need to avoid when caught outside during a thunderstorm in order to minimize the risk of being hurt by lightning?

A
using a plastic umbrella
B
walking on wet land
C
hiding in closed areas
D
taking cover in low structures
25

Which statement accurately describes the relationship between air pressure, air density, or altitude?

A
As altitude increases, pressure increases.
B
As altitude increases, air density increases.
C
Air pressure and density are lowest at sea level.
D
Denser air exerts more pressure than less dense air.
26

Which high-altitude wind system varies in speed based on its distance from the equator and plays a significant role in directing air masses across the globe?

p
polar winds
j
jet streams
c
currents at the equator
t
thermal currents
27

Which phrase defines altitude?

A
how tightly molecules are packed
B
a column of air pushing on an area
C
the force pushing on an area or a surface
D
the height of a given point above sea level
28

Which correctly list the three gases that each make up less than 1 percent of Earth’s atmosphere?

A
argon, water vapor, carbon dioxide
B
oxygen, argon, water vapor
C
nitrogen, oxygen, carbon dioxide
D
carbon dioxide, oxygen, argon
29

What does relative humidity measure?

A
the amount of water in cirrus clouds
B
the amount of water that has evaporated into the air
C
the amount of frozen water that has condensed from the air
D
the amount of water vapor in the air compared to the amount the air can hold
30

Which causes a sea breeze?

A
Air temperatures are cooler than normal.
B
Air flows from the poles toward the equator.
C
Air blows over long distances at different speeds.
D
Air above land warms quicker than air over water.
31

Which type of cloud forms close to the ground when the temperature is just above the dew point?

A
cirrus
B
cumulus
C
fog
D
stratus

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