Water vapor cannot condense onto hygroscopic nuclei particles at relative humidities less than 100 percent.
a. True
b. False
Question 2Contrails form due to the heating of air by aircraft engine exhaust.
a. True
b. False
Question 3Even at high elevations where cirrus clouds are found, liquid water still exists in the clouds.
a. True
b. False
Question 4Fog is a major hazard to aviation.
a. True
b. False
Question 5Steam fog poses a threat to humans with respiratory problems.
a. True
b. False
Question 6Condensation nuclei may be made up of salt from the ocean.
a. True
b. False
Question 7Frost forms when the dew point temperature is at or below freezing.
a. True
b. False
Question 8A large family lives in northern Minnesota. This family gets together for a huge dinner three times a year: on Thanksgiving, on Christmas, and on the March equinox. The Thanksgiving and Christmas dinners consist of turkey, ham, mashed potatoes, and lots of boiled vegetables. The equinox dinner is pizza. The air temperature inside the home is about the same for all three meals (70F), yet everyone remarks about how warm, cozy, and comfortable the air feels during the Thanksgiving and Christmas dinners, and how cool the inside air feels during the March meal. Explain to the family members why they might feel warmer inside the house during Thanksgiving and Christmas and cooler during the March equinox. (The answer has nothing to do with the amount or type of food consumed.)
What will be an ideal response?
Question 9Why is the wet-bulb temperature a good measure of how cool human skin can become?
What will be an ideal response?
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