Answer Key for Exam 1, Form “Kilo”
1) Atmospheric Sciences 336: Weather, Climate, and Society
2) 103 AND 1000
3) Circumference = Pi * D = 3.14 * 8000 = 25,120 miles
4) Four possibilities: Overpopulation, Poverty, Unsustainable Economic Development, Environmental
Degradation (pollution, global warming also okay answers)
5) 1.61 km = 1 mile... 100km per hour = 62 miles per hour
6) 6.65 billion * 0.0115 = 0.076 billion
6.65 billion + 0.076 billion = 6.73 billion
7) Clouds are important because they (FOUR answers):
produce rainfall, remove air pollution, reflect sunlight back into space, are tracers of air motion
8) Clouds that produce rainfall (TWO answers):
cumulonimbus, nimbostratus (it's that nimbo- or nimbus addition – it means rain)
9) Cirrostratus:
10) wind vane or weather vane
11) The temperature rises because the surface is heated by sunlight. At night, there is no source of heat,
so the ground cools until the lowest temperature is reached in the early morning. Temperature depends
only on the presence or absence of sunlight (the heat source). Temperature does not depend on relative
humidity. Relative humidity depends on temperature.
12) Saturation vapor density (or saturation vapor pressure) is dependent on temperature, and increases
as the temperature increases. Thus, for a given amount of water in the air, as the temperature rises, the
ratio of how much water there is (the mixing ratio) to how much water there could be (saturation vapor
density), also known as relative humidity, decreases.
13) 0000 GMT = 5:00PM (Tucson is at GMT -7)
14) Northwest to southeast
Due to the fact that this problem did not have the correct answer listed, all students who took
this form of the test received full credit for #14 regardless of their answer.
15) True
16) 6 g/m3
17) A sling psychrometer AND wet bulb and dry bulb temperatures can be used to determine RH.
18) TWO reasons: heat is absorbed when water evaporates AND the wet bulb temperature is lower than
the dry bulb temperature
19) rain gauge
20) anemometer
21) Changes are measured by the fact that the water in the spout goes down when pressure increases,
and vice versa.
22) No. The weather glass is also sensitive to temperature changes! However, its lack of accuracy has
nothing to do with forecasting rain or anything else. The weather glass is ONLY used for detecting
changes in pressure.
23) ALL SIX of the answers are correct!
24) True
25) 52oF
26) 36oF
27) 30 knots, southwest
28) 1008.2 mb
29) frontal wave cyclone, “cyclone” also acceptable
30) Warm fronts have the triangle-shaped symbols.
31) Point A is LOW, and Point B is HIGH.
32) About 5900 meters
33) 106 or 1,000,000
34) 0.038%
35) stratus
36) True
37) isobars
38) & 39)
40) False
41) West
42) ?? there is no 42...
43) True
44) True
45) 12oF
46) 51%
47) 55oF
48) SEVEN possibilities:
high surface tension (energy), high latent heat, high thermal conductivity, high heat capacity,
density is at a maximum at 4oC, universal solvent, density of solid is less than density of liquid
49) high
50) False (check the units! The question asks about KILOgrams, not grams, like it should be)
Answer Key for Exam 1, Form “Mega”
1) Atmospheric Sciences 336: Weather, Climate, and Society
2) 106 AND 1,000,000
3) Circumference = Pi * D = 3.14 * 8000 = 25,120 miles
4) Four possibilities: Overpopulation, Poverty, Unsustainable Economic Development, Environmental
Degradation (pollution, global warming also okay answers)
5) 1.61 km = 1 mile... 100km per hour = 62 miles per hour
6) 6.65 billion * 0.0115 = 0.076 billion
6.65 billion + 0.076 billion = 6.73 billion
7) Clouds are important because they (FOUR answers):
produce rainfall, remove air pollution, reflect sunlight back into space, are tracers of air motion
8) Clouds that produce rainfall (TWO answers):
cumulonimbus, nimbostratus (it's that nimbo- or nimbus addition – it means rain)
9) Altostratus:
10) wind vane or weather vane
11) The temperature rises because the surface is heated by sunlight. At night, there is no source of heat,
so the ground cools until the lowest temperature is reached in the early morning. Temperature depends
only on the presence or absence of sunlight (the heat source). Temperature does not depend on relative
humidity. Relative humidity depends on temperature.
12) Saturation vapor density (or saturation vapor pressure) is dependent on temperature, and increases
as the temperature increases. Thus, for a given amount of water in the air, as the temperature rises, the
ratio of how much water there is (the mixing ratio) to how much water there could be (saturation vapor
density), also known as relative humidity, decreases.
13) 1200 GMT = 5:00AM (Tucson is at GMT -7)
14) southwest to northeast
15) False
16) 12 g/m3
17) A sling psychrometer AND wet bulb and dry bulb temperatures can be used to determine RH.
18) TWO reasons: heat is absorbed when water evaporates AND the wet bulb temperature is lower than
the dry bulb temperature
19) rain gauge
20) anemometer
21) Changes are measured by the fact that the water in the spout goes down when pressure increases,
and vice versa.
22) No. The weather glass is also sensitive to temperature changes! However, its lack of accuracy has
nothing to do with forecasting rain or anything else. The weather glass is ONLY used for detecting
changes in pressure.
23) ALL SIX of the answers are correct!
24) False
25) 52oF
26) 36oF
27) 30 knots, southwest
28) 1008.2 mb
29) frontal wave cyclone, “cyclone” also acceptable
30) Cold fronts have the semi-circle symbols.
31) Point A is LOW and Point B is HIGH.
32) 5300 meters
33) 106 or 1,000,000
34) 0.038%
35) stratus
36) True
37) isobars
38) & 39)
40) False
41) West
42) ?? there is no 42...
43) True
44) True
45) 12oF
46) 51%
47) 55oF
48) SEVEN possibilities:
high surface tension (energy), high latent heat, high thermal conductivity, high heat capacity,
density is at a maximum at 4oC, universal solvent, density of solid is less than density of liquid
49) low
50) False (check the units! The question asks about KILOgrams, not grams, like it should be)