Name: 
 

Unit 4 Benchmark Test



Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 

Earth’s atmosphere contains more ____ than any other substance.
a.
helium and oxygen
c.
hydrogen and nitrogen
b.
carbon and nitrogen
d.
nitrogen and oxygen
 

2. 

When the temperature in the atmosphere reaches the ____, condensation occurs.
a.
inversion point
c.
evaporation point
b.
flash point
d.
dew point
 

3. 

An air mass that has high ____ resists rising.
a.
stability
c.
moisture
b.
density
d.
heat
 

4. 

In orographic lifting, clouds form when moist winds ____.
a.
become drier
c.
encounter mountains
b.
warm up the ground
d.
flow over the sea
 

5. 

Cloud droplets collide to form larger droplets in a process called ____.
a.
condensation
c.
coalescence
b.
convection
d.
composition
 

6. 

Current, short-term variations in the atmosphere are referred to as ____.
a.
weather
c.
the ionosphere
b.
lapse rate
d.
humidity
 

7. 

The change in wave frequency of energy as it moves toward or away from an observer is the ____.
a.
Coriolis effect
c.
radar effect
b.
Doppler effect
d.
convergence effect
 

8. 

A record of weather data for a particular site at a particular time is a(n) ____.
a.
isopleth model
c.
station model
b.
topographic map
d.
climate map
 

9. 

A(n) ____ thunderstorm forms because of unequal heating of Earth’s surface within one air mass.
a.
air pressure
c.
frontal mass
b.
air mass
d.
cold front
 

10. 

____ are often associated with very severe thunderstorms called supercells.
a.
Sea breezes
c.
Heat waves
b.
Hurricanes
d.
Tornadoes
 

11. 

A mound of water driven toward coastal areas by hurricane winds is called a ____.
a.
cold front
c.
supercell
b.
storm surge
d.
cyclone
 

12. 

The phenomenon in which the effects of cold air are worsened by wind is the ____.
a.
cold wave
c.
supercell
b.
wind chill factor
d.
sea breeze
 

Matching
 
 
Match each item with the correct source region below.
a.
warm and humid
c.
cool and humid
b.
cold and dry
d.
warm and dry
 

13. 

Maritime polar (northern Pacific, Bering Sea)
 

14. 

Continental tropical (southwestern desert of the United States)
 

15. 

Maritime tropical (Gulf of Mexico)
 

16. 

Continental polar (central Canada)
 
 
Match each front with the correct description.
a.
cold front
c.
stationary front
b.
occluded front
d.
warm front
 

17. 

An advancing warm air mass displaces a cold air mass and glides over the top of it.
 

18. 

Two air masses with similar temperatures and pressures meet, and neither advances into the other’s territory
 

19. 

A cold, dense air mass displaces a warm air mass and forces the warm air mass to rise steeply
 

20. 

A warm air mass is squeezed upward between two cold air masses
 

Problem
 
 
Answer the following questions based on the weather chart below.

benchmark-sg-4a_files/i0260000.jpg
 

21. 

Describe the weather at City C.
a.
It is completely overcast, 87% humidity, with strong westerly winds.
b.
The sky is clear with light winds blowing at 1-3 mph from the west.
c.
It is partly cloudy, 87° Fahrenheit, with light winds blowing at 1–3 mph.
d.
It is partly cloudy with a light rain falling, 87° Fahrenheit, winds are 14-23 mph
 



 
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