Weather Practice A) Relative humidity was highest

Weather Practice
1. The chart below shows the air temperature and the dewpoint temperature near the
ground at a given location for four consecutive days. All temperatures were
recorded at noon.
Which statement is best supported by the data?
A)
B)
C)
D)
Relative humidity was highest on day 1.
The greatest amount of water vapor was in the atmosphere on day 2.
The base level for cloud formation was highest on day 3.
The chance of precipitation was greatest on day 4.
2. As the dewpoint temperature of a sample of air decreases, the amount of moisture
in that sample of air
A) decreases
C) remains the same
B) increases
3. The dewpoint changes most directly as a result of changes in the atmosphere's
A) pressure
C) convection currents
B) wind direction
D) water vapor content
4. As wind velocity decreases, the distance between isobars on a weather map will
A) decrease
C) remain the same
B) increase
Weather Practice
5. The map below shows high-pressure and low-pressure weather systems in the
United States.
Which two lettered positions on the map are most likely receiving precipitation?
A) A and B
B) B and D
C) C and E
D) A and D
Weather Practice
6. Which map below shows the most likely storm track for a hurricane in the Atlantic
Ocean?
A)
B)
C)
Weather Practice
D)
7. The diagram below shows the isolines of air pressure around a low-pressure center.
On which side of the low-pressure center will the wind speed be greatest?
A) north
B) south
C) east
D) west
Weather Practice
Base your answers to questions 8 and 9 on the weather map below, which shows a
low-pressure system over the central United States. Isobars are labeled in
millibars. Points A, B, C, and D represent locations on Earth's surface.
8. Which location is most likely experiencing the fastest wind speed?
A) A
B) B
C) C
D) D
9. The air pressure at the center of this low is
A) 991 mb
B) 994 mb
C) 997 mb
D) 1001 mb
10. How many joules of heat energy must be added to 5 grams of liquid water to
change its temperature from 10°C to 30°C?
A) 83.6 joules
C) 312.6 joules
B) 100 joules
D) 418 joules
Weather Practice
11. The diagram below represents an aneroid barometer that shows the air pressure,
in inches of mercury.
When converted to millibars, this air pressure is equal to
A) 1009.0 mb B) 1012.5 mb C) 1015.5 mb D) 1029.9 mb
12. Which weather condition most directly determines wind speeds at Earth’s
surface?
A) visibility changes
C) air-pressure gradient
B) amount of cloud cover
D) dewpoint differences
Weather Practice
13. A weather instrument is shown below.
Which weather variable is measured by this instrument?
A) wind speed
C) cloud cover
B) precipitation
D) air pressure
Base your answers to questions 14 through 16 on the graph below which shows
variations in Earth's monthly temperatures from normal Earth temperatures
between January 1990 and January 1995.
14. Earth's average monthly temperature for October 1990 was approximately
A) 0.1ºC above normal
C) 0.3ºC above normal
B) 0.2ºC above normal
D) 0.4ºC above normal
Weather Practice
15. According to the graph, the longest time period that average Earth temperatures
were warmer than normal was approximately
A) 8 months
B) 14 months C) 26 months D) 30 months
16. The greatest temperature variation from normal occurred during
A) May 1991
C) July 1993
B) August 1992
D) March 1994
Base your answers to questions 17 and 18 on the weather map below, which
shows a low-pressure system over the eastern United States. Letters A through D
represent weather stations.
17. Which weather instrument was used to measure wind speed at station D?
A) barometer
C) psychrometer
B) thermometer
D) anemometer
Weather Practice
18. Surface winds within this low-pressure system most likely are flowing
A)
B)
C)
D)
toward the center in a clockwise pattern
toward the c enter in a counterclockwise pattern
away from the center in a clockwise pattern
away from the center in a counterclockwise pattern
Weather Practice
19. The weather map below shows the air temperatures recorded at the same time at
cities across the United States.
Which map correctly shows the locations of the 40°F and 50°F isotherms?
Weather Practice
A)
B)
C)
D)
20. An air pressure of 1,005 millibars is equivalent to approximately how many
inches of mercury?
A) 29.58
B) 29.62
C) 29.68
D) 29.72
Weather Practice
21. Which weather variable is measured by a barometer?
A) dewpoint
B) wind speed C) air pressure D) visibility
Base your answers to questions 22 and 23 on the weather map below, which
shows a low-pressure system centered near Poughkeepsie, New York. Isobars
shown are measured in millibars.
22. Which city is most likely experiencing winds of the greatest velocity?
A) New York City
C) Poughkeepsie
B) Binghamton
D) Scranton
23. Surface winds are most likely blowing from
A)
B)
C)
D)
Danbury toward New York City
Poughkeepsie toward Scranton
Binghamton toward Danbury
Port Jervis toward Binghamton
Weather Practice
24. Which weather station model for a New York State location indicates that snow
may be about to fall?
A)
B)
C)
D)
25. Wind velocity is most directly dependent on the
A) gradient of the air pressure field B) value of the Coriolis effect
C) moisture content of the air
D) rotational velocity of the Earth
26. Which weather instrument has most improved the accuracy of weather forecasts
over the past 40 years?
A) thermometer
C) weather satellite
B) sling psychrometer
D) weather balloon
Weather Practice
27. Which graph best represents the relationship between air temperature and air
density in the atmosphere?
A)
B)
C)
D)
28. Air pressure is usually highest when the air is
A) warm and humid
C) cold and humid
B) warm and dry
D) cold and dry
29. Which weather change is most likely indicated by rapidly falling air pressure?
A) Humidity is decreasing.
C) Skies are clearing.
B) Temperature is decreasing.
D) A storm is approaching.
Weather Practice
30. The diagram below represents the path of visible light as it travels from air to
water to air through a glass container of water.
The light did not travel in a straight line because of
A) convection B) scattering
C) absorption D) refraction
31. An observer measured the air temperature and the dewpoint and found the
difference between them to be 12°C. One hour later, the difference between the
air temperature and the dewpoint was found to be 4°C. Which statement best
describes the changes that were occurring?
A) The relative humidity was decreasing and the chance of precipitation was
decreasing.
B) The relative humidity was decreasing and the chance of precipitation was
increasing.
C) The relative humidity was increasing and the chance of precipitation was
decreasing.
D) The relative humidity was increasing and the chance of precipitation was
increasing.
Weather Practice
Base your answers to questions 32 and 33 on the graph below, which shows the
average daily precipitation for Paris, France, during an 8-year period.
32. Which days showed the greatest difference in average precipitation during this
8-year period?
A) Mondays and Tuesdays
C) Thursdays and Fridays
B) Wednesdays and Thursdays
D) Fridays and Saturdays
33. The average weekly precipitation total for Paris, France, during the 8-year period
was approximately
A) 13 mm/week
C) 30 mm/week
B) 2 mm/week
D) 91 mm/week
34. A temperature of 73° Fahrenheit is approximately equal to a temperature of
A) 17° Celsius
C) 26° Celsius
B) 23° Celsius
D) 162° Celsius
Weather Practice
35. Data from two weather instruments have been recorded on the graph below. Line
A on the graph represents air-temperature data. Line B was plotted using the scale
for variable B.
Line B on the graph represents data from which weather instrument?
A) thermometer
C) psychrometer
B) barometer
D) anemometer
36. The air-pressure field map below represents a high-pressure system over the
central United States. Isobars show the air pressure, in millibars. Letters A
through E represent locations on Earth's surface.
Between which two locations is the wind speed greatest?
A) A and B
B) B and C
C) C and D
D) D and E
Weather Practice
Base your answers to questions 37 and 38 on the map below, which shows
sea-level air pressure, in millibars, for a portion of the eastern coast of North
America. Points A, B, C, and D are sea-level locations on Earth’s surface.
37. Which weather instrument was used to measure the air pressures?
A) thermometer
C) sling psychrometer
B) wind vane
D) barometer
38. The air pressure recorded at point D was most likely
A) 1014 mb
B) 1012 mb
C) 1010 mb
D) 1006 mb
Weather Practice
39. On a July afternoon in Florida, the barometric pressure is 29.85 inches and
falling. This reading most likely indicates
A) an approaching storm
C) continuing fair weather
B) rapidly clearing skies
D) gradually improving conditions
40. An air pressure of 29.47 inches of mercury is equal to
A) 996 mb
B) 998 mb
C) 1,002 mb
D) 1,014 mb
41. The highest surface wind speeds occur when there is a
A)
B)
C)
D)
4-millibar air-pressure difference between two nearby locations
4-millibar air-pressure difference between two distant locations
20-millibar air-pressure difference between two nearby locations
20-millibar air-pressure difference between two distant locations
Weather Practice
42. The diagram below shows weather instruments A and B.
Which table correctly indicates the name of the weather instrument and the
weather variable that it measures?
A)
B)
C)
D)
Weather Practice
43. The weather map below shows isobars labeled in millibars. Points A, B, C, and D
are locations on Earth's surface.
Which location was probably experiencing the highest wind speed?
A) A
B) B
C) C
D) D
Weather Practice
44. The graph below shows the air temperature and dewpoint temperature at one
location at four different times during one morning.
At what time was the chance of precipitation the greatest?
A) 1 a.m.
B) 5 a.m.
C) 3 a.m.
D) 7 a.m.
45. As the temperature of the atmosphere at a given location increases, the air
pressure will most likely
A) decrease
C) remain the same
B) increase
46. Which weather variable can be determined by using a psychrometer?
A) barometric pressure
C) relative humidity
B) cloud cover
D) wind speed
Weather Practice
Base your answers to questions 47 and 48 on the data table below, which shows
the air temperature, in degrees Fahrenheit, and air pressure, in inches of mercury
(Hg), recorded at a weather station in New York State from 11 a.m. to 7 p.m. on a
day in September.
Weather Practice
47. On the grid below, construct a line graph by plotting the data for the air
temperature for each time from 11 a.m. to 7 p.m. Connect the plots with a line.
The data for air pressure have been plotted.
48. State the relationship between air temperature and air pressure from 11 a.m. to 2
p.m.
Weather Practice
49. Surface winds on Earth are primarily caused by differences in
A)
B)
C)
D)
air density due to unequal heating of Earth’s surface
ocean wave heights during the tidal cycle
rotational speeds of Earth’s surface at various latitudes
distances from the Sun during the year
50. The cartoon below shows a strong wind blowing from right to left.
The wind is blowing from right to left because the region to the right has a higher
A) air temperature
C) relative humidity
B) air pressure
D) elevation
51. A barometric pressure of 1021.0 millibars is equal to how many inches of
mercury?
A) 29.88
B) 30.15
C) 30.25
D) 30.50
Weather Practice
52. In the United States, most tornadoes are classified as intense
A)
B)
C)
D)
low-pressure funnel clouds that spin clockwise
low-pressure funnel clouds that spin counterclockwise
high-pressure funnel clouds that spin clockwise
high-pressure funnel clouds that spin counterclockwise
53. A map of the United States is shown below.
Weather conditions in which location would be of most interest to a person
predicting the next day's weather for New York State?
A) A
B) B
C) C
D) D
54. Various weather conditions at LAX Airport in Los Angeles are shown on the
station model below.
What were the barometric pressure and weather conditions at the airport at the
time of the observation?
A)
B)
C)
D)
914.6 mb of pressure and smog
914.6 mb of pressure and a clear sky
1014.6 mb of pressure and smog
1014.6 mb of pressure and a clear sky
Weather Practice
55. Weather-station measurements indicate that the dewpoint temperature and air
temperature are getting farther apart and that air pressure is rising. Which type of
weather is most likely arriving at the station?
A) a snowstorm
C) cool, dry air
B) a warm front
D) maritime tropical air
56. Which weather variable would most likely decrease ahead of an approaching
storm system?
A) wind speed
C) cloud cover
B) air pressure
D) relative humidity
57. The graph below shows air temperature for an area near the Earth's surface during
a 12-hour period.
Which graph best illustrates the probable change in air pressure during the same
time period?
A)
B)
C)
D)
Weather Practice
58. In a certain area the air temperature and the dewpoint temperature are
approaching the same value. The air pressure is decreasing and the cloud cover is
increasing. What atmospheric change is most likely occurring in this area?
A)
B)
C)
D)
Warm, moist air is moving into the area.
Warm, dry air is moving into the area.
Cold, dry air is moving into the area.
A cold front has just passed through this area.
59. Base your answer to the following question on the graph below, which shows the
average yearly temperature and average yearly precipitation for Earth locations A
through E.
The climate indicated at location E on the graph would most likely be classified
as
A) cold and dry
C) warm and dry
B) cold and humid
D) warm and humid
Weather Practice
60. Which list correctly matches each instrument with the weather variable it
measures?
A) wind vane—wind speed
thermometer—temperature
precipitation gauge—relative humidity
B) wind vane—wind direction
thermometer—dewpoint
psychrometer—air pressure
C) barometer—relative humidity
anemometer—cloud cover
precipitation gauge—probability of precipitation
D) barometer—air pressure
anemometer—wind speed
psychrometer—relative humidity
61. Which cross section below best shows the locations of high air pressure and low
air pressure near a beach on a hot, sunny, summer afternoon?
A)
B)
C)
D)
Weather Practice
62. Which graph best represents the relationship between air temperature and air
density in the atmosphere?
A)
B)
C)
D)
63. Which graph best represents the change in air pressure as air temperature
increases at Earth's surface?
A)
B)
C)
D)
Weather Practice
64. The table below shows air-pressure readings taken at two cities, in the same
region of the United States, at noon on four different days.
The wind speed in the region between cities A and B was probably the greatest at
noon on day
A) 1
B) 2
C) 3
D) 4
65. An instrument used to measure a weather variable is shown below.
Which weather variable is measured by this instrument?
A) wind direction
C) wind speed
B) air pressure
D) amount of rainfall
Weather Practice
Base your answers to questions 66 and 67 on the diagram below of a weather
instrument.
66. In Connecticut, which weather conditions are most likely to exist when the height
of the mercury in the tube is much greater than 30 inches?
A)
B)
C)
D)
cold, dry air with clear skies
warm, moist air with overcast skies
strong southerly winds with hail warnings
a violent storm associated with the autumn season
67. Which weather variable is this instrument designed to measure?
A) visibility
C) dewpoint temperature
B) relative humidity
D) air pressure
Weather Practice
68. Base your answer to the following question on the data table below, which shows
the air pressures and air temperatures collected by nine observers at different
elevations on the same side of a high mountain. The data were collected at 12:00
noon on a clear, calm day.
From sea level to an elevation of 1,200 meters, air pressure decreased at the rate
of
A) 1.0 mb/m
C) 10.0 mb/m
B) 0.1 mb/m
D) 100.0 mb/m
Weather Practice
69. Base your answer to the following question on the weather map below, which
shows the location of fronts and the temperature field on a given day in the United
States.
Which two cities most likely have an air temperature closest to 75°F?
A) Chicago and Detroit
C) Oklahoma City and Memphis
B) Los Angeles and Denver
D) Cincinnati and Kansas City
Weather Practice
Base your answers to questions 70 and 71 on the weather map below. Points A, B,
C, and D are locations on Earth's surface.
70. The isolines on the map represent values of air
A) density
C) pressure
B) humidity
D) temperature
71. The strongest winds are closest to location
A) A
B) B
C) C
D) D
Weather Practice
72. The cross section below shows a sea breeze blowing from the ocean toward the
land. The air pressure at the land surface is 1013 millibars.
The air pressure at the ocean surface a few miles from the shore is most likely
A) 994 mb
B) 1005 mb
C) 1013 mb
D) 1017 mb
73. In the diagram below, points A and B identify two points in the atmosphere
above the surface of a body of water.
Which graph best represents the vapor pressure (amount of moisture) from point
A to point B?
A)
B)
C)
D)
Weather Practice
Base your answers to questions 74 and 75 on the weather map below, which
represents a low-pressure system over New York State. The L on the map
represents the center of the low-pressure system. Two fronts extend from the
center of the low, and are labeled front 1 and front 2. Cloud cover has been
omitted from the station models.
74. The arrows on which map best represent the surface wind pattern around this
low-pressure center?
A)
B)
C)
D)
Weather Practice
75. Which map best represents the type of fronts and direction of movement of these
fronts in relation to the low-pressure center?
A)
B)
C)
D)
76. A temperature of 20°C is equal to a temperature of
A) –7°F
B) 36°F
C) 68°F
D) 293°F
Weather Practice
77. The map below shows two seasonal positions of the polar front jet stream over
North America.
Which statement best explains why the position of the polar front jet stream
varies with the seasons?
A)
B)
C)
D)
Rising air compresses and cools in winter.
Water heats and cools more rapidly than land in winter.
Prevailing winds reverse direction in summer.
The vertical rays of the Sun shift north of the equator in summer.
78. An air temperature of 30°C is equal to
A) –22°F
B) –2°F
C) 74°F
D) 86°F
79. Students wish to study the effect of elevation above sea level on air temperature
and air pressure. They plan to hike in the Adirondack Mountains from Heart
Lake, elevation 2,179 feet, to the peak of Mt. Marcy, elevation 5,344 feet. Which
instruments should they use to collect their data?
A) anemometer and psychrometer B) anemometer and barometer
C) thermometer and psychrometer D) thermometer and barometer
Weather Practice
80. The graph below shows the maximum possible amounts of water vapor that air
can hold at different temperatures.
What is the approximate maximum amount of water vapor that a cubic meter of
air can hold at 20°C?
A) 15 g
B) 20 g
C) 25 g
D) 30 g
81. At which of these latitudes would average annual precipitation be greatest?
A) 0º
B) 30º N
C) 90º N
D) 90º S
82. As warm, moist air moves into a region, barometric pressure readings in the
region will generally
A) decrease
C) remain the same
B) increase
Weather Practice
83. Which weather conditions are most probable when the moisture content of the air
increases, resulting in a lower atmospheric pressure?
A)
B)
C)
D)
sunny and fair
cold and windy
partly cloudy, with skies becoming clear
cloudy, with a chance of precipitation
84. Earth’s surface winds generally blow from regions of higher
A)
B)
C)
D)
air temperature toward regions of lower air temperature
air pressure toward regions of lower air pressure
latitudes toward regions of lower latitudes
elevations toward regions of lower elevations
85. Wind is caused mainly by air-pressure differences that result from
A)
B)
C)
D)
uneven heating of Earth's atmosphere
absorption of ultraviolet radiation by Earth's landmasses
radiation of heat from Earth's landmasses to water bodies
rotation of Earth on its axis
86. Air pressure is usually highest when the air is
A) cool and humid
C) warm and humid
B) cool and dry
D) warm and dry
87. What is the relative humidity when the dry-bulb temperature is 16°C and the
wet-bulb temperature is 14°C?
A) 90%
B) 80%
C) 14%
D) 13%
Weather Practice
88. Daily weather forecasts are based primarily on
A) ocean currents
C) phases of the Moon
B) seismic data
D) air-mass movements
89. A temperature of 104°F is approximately equal to
A) 220°C
B) 214°C
C) 43°C
D) 40°C
90. A weather map of New York State shows isobars that are close together,
indicating a steep pressure gradient. Which weather condition is most likely
present?
A) dry air
C) low temperatures
B) strong winds
D) low visibility
91. Base your answer to the following question on the graph below. The graph shows
air temperature and relative humidity at a single location during a 24-hour period.
What was the approximate change in relative humidity from 12 noon to 4 p.m.?
A) 10%
B) 15%
C) 20%
D) 30%
Weather Practice
92. Base your answer to the following question on the diagram below. The diagram
shows the pattern of air movement within a closed room.
If the room is considered a model of circulation in the Earth's atmosphere, at
which location would air pressure be greatest?
A) A
B) B
C) E
D) F
93. Which gas in the atmosphere has the most influence on day-to-day weather
changes?
A) ozone
C) water vapor
B) oxygen
D) carbon dioxide
Weather Practice
94. The weather map below shows closely spaced isobars in the region of Albany,
New York.
At the time that the weather data were collected, Albany was most probably
experiencing
A) a high wind velocity
C) the passage of a dry air mass
B) a high temperature
D) the passage of a warm air mass
Weather Practice
95. The map below shows a weather variable recorded at noon on a certain day.
Isolines show values from 20 to 70.
Which atmospheric variable is most likely represented by the isolines on this
map?
A)
B)
C)
D)
snowfall in inches
wind speed in knots
barometric pressure in millibars
air temperature in degrees Fahrenheit
Weather Practice
96. Base your answer to the following question on the weather map below, which
shows a storm system centered near the Great Lakes. Letters A through D
represent weather stations shown on the map.
What weather conditions are shown at location D?
A)
B)
C)
D)
cloudy skies with light snow
cloudy skies with freezing rain
saturated air with no precipitation
partly cloudy skies with rain showers
97. Which factor most directly affects the wind speed between two locations?
A) air pressure
C) dewpoint temperature
B) Coriolis force
D) cloud cover
Weather Practice
98. The graph below shows the surface air pressure at a certain city during a five-day
period. On which day was the warmest airmass probably over the city for the
entire day?
A) Monday
B) Tuesday
C) Wednesday D) Friday
99. Adjacent water and landmasses are heated by the morning Sun on a clear, calm
day. After a few hours, a surface wind develops. Which map best represents this
wind's direction?
A)
B)
C)
D)
Weather Practice
100. Which graph best shows the general relationship between altitude and
temperature in the troposphere?
A)
B)
C)
D)
101. A high-pressure center is generally characterized by
A) cool, wet weather
C) warm, wet weather
B) cool, dry weather
D) warm, dry weather