Please answer questions in complete sentences.
Each question is worth 1 point (10 points total for this activity).
Show your work for #5.
1. Over the course of a day, the sun’s radiation is most intense at noon. However, the daily
maximum temperature usually occurs a few hours later. Explain why.
2. On a clear winter night with calm winds, frost can form on grassy surfaces even if official
temperature measurements show air temperatures above freezing (as high as 36°F). What
atmospheric conditions can allow this to happen?
3. What are thermal belts? Why do they form on hillsides during clear nights with calm winds?
4. What are four controls on temperature?
5. The daily average air temperature on a particular day was 74°F. How many cooling-degree days
were present?
6. Give
two
reasons that on a cold day, a brisk wind will make it feel colder than air temperatures
indicate.
7. The air temperature is 25°F and the wind speed is 15 miles per hour. What is the wind-chill
index?
8. Name four types of thermometers.
9. The temperature in the upper thermosphere can be 1000°F. Yet, when shaded from the sun, a
person would not necessarily feel hot at this altitude. Explain why.
10. Why are air temperatures given by bank thermometers often inaccurate, especially on hot and
clear summer days?
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