Question 1

After a summer hike up to the summit of Mt. Sanitas you decide to dip your feet into Boulder Creek to cool off. Which statement below best describes the heat transfer mechanism that occurs when you first dip your feet into Boulder Creek?

1. The creek transfers heat to your feet to cool them off through conduction
2. The creek transfers heat to your feet to cool them off through convection
3. Your feet cool off by losing heat to the creek through conduction
4. Your feet and the creek are in radioactive equilibrium and there is no transfer of heat

Question 2

This past weekend, a few snow flurries fell from the sky but sublimated before hitting the ground in Boulder. This process requires a transfer of _________ heat, which acts to ______________ the environment.

1. sensible; warm
2. latent; cool
3. sensible; cool
4. latent; warm

Question 3

When moist air rises within the atmosphere, water vapor condenses onto aerosols to form clouds. This process requires a transfer of _________ heat, which acts to _____________ the environment.

1. sensible; warm
2. latent; cool
3. sensible; cool
4. latent; warm

Question 4

In the wake of a cold frontal passage along the Front Range, horizontal winds usher in much colder temperatures. This process represents an example of __________.

1. advection
2. convection
3. conduction
4. radiation

Question 5

Object A has a temperature of 300 K, while Object B has a temperature of 273 K. Consequently, Object A will radiate ______ energy than Object B, and the radiation from Object A will be at _______ wavelengths than Object B.

1. less; shorter
2. less; longer
3. more; shorter
4. more; longer

Question 6

Above is an absorption spectrum for a variety of atmospheric constituents. Approximately what percentage of radiation does water vapor (H2O) absorb at wavelengths between 5–6 microns (i.e., the range between the red and pink vertical bars)?

1. 0%
2. 25%
3. 50%
4. 100%

Question 7

Choose all that Apply: Which of the following are true concerning the presence of greenhouse gases in Earth’s atmosphere?

1. Without greenhouse gases, temperatures on the planet would be much colder
2. Greenhouse gases are good absorbers of shortwave radiation from the sun
3. Greenhouse gases are good absorbers of longwave radiation emitted from Earth
4. Greenhouse gases are particularly good conductors of heat

Question 8

Why does the sky appear blue during the day?

1. The atmosphere preferentially absorbs light at red/yellow wavelengths
2. The atmosphere preferentially scatters light at red/yellow wavelengths towards your eyes
3. The atmosphere preferentially absorbs light at blue wavelengths
4. The atmosphere preferentially scatters light at blue wavelengths towards your eyes

Question 9

Why is it generally warmer during the Northern Hemisphere summer than during the Northern Hemisphere winter?

1. The Earth is closer to the sun during the summer
2. The Northern Hemisphere is tilted towards the sun during the summer
3. The Earth is farther away from the sun during the summer
4. A and B

Question 10

On Day 1, Boulder experiences clear skies overnight, while on Day 2 Boulder experiences overcast (cloudy) skies. Which night will feature colder temperatures and why?

1. Day 1, clear skies allow for more longwave radiation from Earth to be absorbed within the atmosphere
2. Day 1, clear skies allow for more longwave radiation from Earth to escape to space
3. Day 2, cloudy skies allow for more longwave radiation from Earth to be absorbed within the atmosphere
4. Day 2, cloudy skies allow for more longwave radiation from Earth to escape to space

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