1. A) always less
B) always greater
C) always the same
D) sometimes less and sometimes greater
1. Compared to the density of liquid water, the density of
an ice cube is
A) 1,000.0 mb B) 1,005.5 mb
C) 1,013.2 mb D) 1,020.4 mb
2. When the height of the mercury in a barometer is 29.92
inches, the barometric pressure is
A) dewpoint B) wind speed
C) air pressure D) visibility
3. Which weather variable is measured by a barometer?

2. 4. Base your answer to the following question on the data table, which shows recorded information for a major
Atlantic hurricane and the map below.
Identify the weather instrument used to measure the air pressure associated with this hurricane.

3. 5. Base your answer to the following question on the weather map below, which shows a low-pressure system
over the eastern United States. Letters A through D represent weather stations.
A) barometer B) thermometer C) psychrometer D) anemometer
Which weather instrument was used to measure wind speed at station D?
6. Base your answer to the following question on the weather map provided below, which shows surface
air-pressure readings, in millibars, at various locations in the United States and Canada. The 1020-millibar
isobars have been drawn and labeled.
What weather instrument was most likely used to measure these air pressures?

4. 7. What is the air pressure indicated by the diagram of the
mercury barometer at the right?
A) 1028.1 mb B) 1028.5 mb
C) 1029.5 mb D) 1031.0 mb
8. Base your answer to the following question on The
diagram below represents an aneroid barometer that
shows the air pressure, in inches of mercury.
A) 1009.0 mb B) 1012.5 mb
C) 1015.5 mb D) 1029.9 mb
When converted to millibars, this air pressure is equal to
9. Base your answer to the following question on the
weather map below. Points A, B, C, and D are locations
on Earth's surface.
A) A B) B C) C D) D
The strongest winds are closest to location
A) air density due to unequal heating of Earth’s
surface
B) ocean wave heights during the tidal cycle
C) rotational speeds of Earth’s surface at various
latitudes
D) distances from the Sun during the year
10. Surface winds on Earth are primarily caused by
differences in

5. 11. Base your answer to the following question on the
weather map below, which shows a low-pressure
system centered near Poughkeepsie, New York. Isobars
shown are measured in millibars.
A) Danbury toward New York City
B) Poughkeepsie toward Scranton
C) Binghamton toward Danbury
D) Port Jervis toward Binghamton
Surface winds are most likely blowing from
A) air temperature toward regions of lower air
temperature
B) air pressure toward regions of lower air pressure
C) latitudes toward regions of lower latitudes
D) elevations toward regions of lower elevations
12. Earth’s surface winds generally blow from regions of
higher
A) high air temperature to regions of low air
temperature
B) high air pressure to regions of low air pressure
C) high precipitation to regions of low precipitation
D) convergence to regions of divergence
13. Winds blow from regions of
A) humidity differences
B) air pressure differences
C) the revolution of Earth
D) the rotation of Earth
14. What is the primary cause of winds?
A) -17°C B) 6°C C) 3°C D) 4°C
15. What is the dewpoint temperature when the dry-bulb
temperature is 14°C and the wet-bulb temperature is
10°C?
A) 1ºC B) -2ºC C) -5ºC D) 4ºC
16. What is the dewpoint temperature when the dry-bulb
temperature is 12ºC and the wet-bulb temperature is
7ºC?
A) 6ºC B) 12ºC C) 14ºC D) 17ºC
17. What is the approximate dewpoint temperature when
the dry-bulb temperature is 24ºC and the wet-bulb
temperature is 18ºC?
A) 1º C B) -10º C
C) 7º C D) 4º C
18. What is the approximate dewpoint temperature if the
dry-bulb temperature is 18ºC and the wet-bulb
temperature is 11ºC?
A) 1ºC B) -5ºC C) 6ºC D) 4ºC
19. What is the dewpoint temperature when the dry-bulb
temperature is 12ºC and the wet-bulb temperature is
7ºC?
A) 8.0ºC B) 10.ºC C) 11ºC D) 12ºC
20. What is the approximate dewpoint temperature when
the dry-bulb temperature is 18ºC and the wet-bulb
temperature is 14.5ºC?
A) 5°C B) 7°C
C) 9°C D) –17°C
21. What is the dewpoint temperature when the dry-bulb
temperature is 16°C and the wet-bulb temperature is
11°C?