Download latent heat/humidity

latent heat/humidity
1.
3.
Base your answer(s) to the following question(s) on the Earth
Science Reference Tables, the graph below, and your knowledge
of Earth science. The graph shows variations in air temperature
and relative humidity for a spring day in Oswego, New York.
Which graph best shows the relationship between the probability
of precipitation and the difference between air temperature and
dewpoint?
A.
B.
Which change most likely caused the decrease in relative
humidity between 6:00 am and 3:00 pm?
A.
The dewpoint increased
B.
The moisture content of the air increased
C.
The rate of evaporation increased
D. The air temperature increased
C.
2.
The accompanying chart 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.
Day
Air
Dewpoint
Temperature Temperature
( ◦ C)
( ◦ C)
1
20
11
3
16
14
2
4
18
20
D.
17
13
Which statement is best supported by the data?
A.
Relative humidity was highest on day 1.
B.
The greatest amount of water vapor was in the atmosphere
on day 2.
C.
The base level for cloud formation was highest on day 3.
D. The chance of precipitation was greatest on day 4.
page 1
4.
Which weather change usually occurs when the difference
between the air temperature and the dewpoint temperature is
decreasing?
A.
The amount of cloud cover decreases.
B.
The probability of precipitation decreases.
C.
The relative humidity increases.
8.
Which statement should be placed in the empty box to accurately
complete the flowchart?
D. The barometric pressure increases.
5.
The incomplete flowchart below shows some of the changes that
occur in warm air as it rises to form a cloud.
A.
The air warms as it expands.
B.
The air cools until it reaches the dewpoint.
C.
The air’s relative humidity decreases to zero.
D. The air enters the thermosphere.
Base your answer(s) to the following question(s) on the graph
below. The graph shows air temperature and relative humidity at
a single location during a 24-hour period.
9.
The accompanying graph shows the maximum possible amounts
of water vapor that air can hold at different temperatures.
At which time would the rate of evaporation most likely be
greatest?
A.
6.
11 pm
B.
6 am
C.
10 am
D. 4 pm
A student uses a sling psychrometer outdoors on a clear day.
The dry-bulb (air) temperature is 10 ◦ C. The water on the wet
bulb will most likely
A.
condense, causing the wet-bulb temperature to be higher
than the air temperature
B.
condense, causing the wet-bulb temperature to be equal to
the air temperature
C.
evaporate, causing the wet-bulb temperature to be lower
than the air temperature
What is the approximate maximum amount of water vapor that a
cubic meter of air can hold at 20 ◦ C?
A.
D. evaporate, causing the wet-bulb temperature to be equal to
the air temperature
7.
10.
What is the dewpoint if the relative humidity is 100% and the
air temperature is 20 ◦ C?
A.
0◦ C
B.
10 ◦ C
C.
20 ◦ C
15 g
B.
20 g
C.
25 g
D. 30 g
During which phase change of water is the most energy released
into the environment?
A.
water freezing
B.
ice melting
C.
water evaporating
D. water vapor condensing
D. 100 ◦ C
page 2
latent heat/humidity
11.
The flowchart shows part of Earth’s water cycle. The question
marks indicate a part of the flowchart that has been deliberately
left blank.
13.
The letters A through D in the cross section below represent
four of the processes that are part of the water cycle.
Which process should be shown in place of the question marks
to best complete the flowchart?
A.
condensation
B.
deposition
C.
evaporation
D. infiltration
Which table correctly matches each letter with the process that
it represents?
A.
Letter
condensation
C
transpiration
D
evaporation
B
12.
Base your answer(s) to the following question(s) on the water
cycle diagram shown below. Some arrows are numbered 1
through 4 and represent various processes.
C.
Process
A
Letter
B.
precipitation
Process
A
transpiration
B
precipitation
C
evaporation
D
condensation
Letter
evaporation
B
condensation
D
transpiration
C
D.
Process
A
Letter
precipitation
Process
A
condensation
C
evaporation
D
transpiration
B
precipitation
The clouds have formed primarily because moist air
A.
rises, expands, and cools
B.
rises, expands, and warms
C.
sinks, compresses, and cools
14.
D. sinks, compresses, and warms
page 3
Which weather variable can be determined by using a
psychrometer?
A.
barometric pressure
B.
cloud cover
C.
relative humidity
D. wind speed
latent heat/humidity
15.
The weather instrument below is used to determine dewpoint
and relative humidity.
16.
Base your answer(s) to the following question(s) on the Earth
Science Reference Tables, the graph below, and your knowledge
of Earth science. The graph shows variations in air temperature
and relative humidity for a spring day in Oswego, New York.
What was the approximate relative humidity at 6:00 pm?
A.
17.
Based on the temperatures shown, the approximate dewpoint and
relative humidity are
A.
−19 ◦ C and 4%
B.
C.
8 ◦ C and 40%
D. 12 ◦ C and 53%
11%
B.
47%
C.
59%
D. 71%
At what time did the air most likely have the greatest capacity
to hold water vapor?
A.
5 am
B.
10 am
C.
5 pm
D. 10 pm
−5 ◦ C and 25%
18.
On a very hot summer afternoon, the air over Long Island is
warmer than the air over the nearby ocean. As a result, the air
over Long Island tends to
A.
sink and cool,causing clouds to form
B.
sink and warm, causing clouds to disappear
C.
rise and cool, causing clouds to form
D. rise and warm, causing clouds to disappear
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latent heat/humidity
19.
The accompanying cartoon shows a humorous view of a weather
phenomenon.
22.
Which processes of the water cycle return water vapor directly
to the atmosphere?
A.
evaporation and transpiration
B.
infiltration and capillarity
C.
freezing and precipitation
D. water retention and runoff
Rain fell from the clouds because
A.
too few condensation nuclei were in the cloud
B.
the cloud’s water droplets combined and became large
enough to fall
C.
evaporation in the upper portion of the cloud caused the
cloud to become smaller and “squeezed” water out
23.
D. the temperature in the cloud rose above the dewpoint
20.
During the summer in Maine, fog sometimes forms. Fog is best
described as
A.
ice crystals.
B.
rain.
C.
snow.
D. water droplets.
Base your answer(s) to the following question(s) on the graph,
which shows the changes in relative humidity and air temperature
during a spring day in Washington, D.C.
24.
The following tables show the weekly forecasts for several days
during the summer and winter in Greenville, Mississippi.
Forecast During a Week in the Summer
High
Low
Temperature Temperature
◦
( F)
( ◦ F)
Which statement best describes the relationship between relative
humidity and air temperature as shown by the graph?
A.
Relative humidity decreases as air temperature decreases.
B.
Relative humidity decreases as air temperature increases.
C.
B.
C.
warm, humid, and calm
D. warm, dry, and windy
73
71%
0.00
13
95
76
69%
0.00
24
Wednesday
95
75
72%
0.00
10
Thursday
94
73
70%
0.12
21
Average
Humidity
Precipitation
Average
(inches)
Wind Speed
(mph)
Monday
62
34
67%
1.97
26
Tuesday
68
52
86%
0.12
29
Wednesday
52
35
89%
0.19
12
Thursday
47
33
69%
1.23
22
Which statement describes the weather for Greenville,
Mississippi?
A container of water is placed in an open outdoor area so that
the evaporation rate can be observed. The water will most likely
evaporate fastest when the weather is
cool, humid, and windy
96
Tuesday
Forecast During a Week in the Winter
Relative humidity increases as air temperature increases.
A.
Precipitation
Average
(inches)
Wind Speed
(mph)
Monday
High
Low
Temperature Temperature
◦
( F)
( ◦ F)
D. Relative humidity remains the same as air temperature
decreases.
21.
Average
Humidity
A.
Greater humidity during the summer
B.
More precipitation during the winter
C.
Higher temperatures during the winter
D. Faster wind speeds during the summer
cool, dry, and calm
page 5
latent heat/humidity