S-290 STUDY EXAMS GUIDE ALL QUESTIONS AND
ANSWERS SURE A+
✔✔On the average, RH _______ with each 20 degree decrease in temperature or
_______ with each 20 degree inrease in temperature. - ✔✔Doubles; Halves
✔✔True/ False
The highest relative humidity usually occurs with the highest temperature. - ✔✔False
✔✔True/False
Relative humidity is usually lower on north aspecs - ✔✔False
✔✔True/False
The type of vegetation has little affect on temperature and humidity. - ✔✔False
✔✔Define Relative Humidity - ✔✔The RATIO of the amount of moisture in the air,
RELATIVE to the maximum amount of moisture that air could contain if it were
saturated.
✔✔What is a good indicator of moisture in the air and changes little during the day if the
air mass is constant. - ✔✔Dew Point
, ✔✔True/False
Daily high temperatures are warmer on steep slopes than on flat fields in the same area
and at the same elevation - ✔✔False; there is more solar radiation on flat slopes
✔✔Two processes that can change the RH - ✔✔1. Change Temperature
2. Change Dew Point
✔✔What is identical to the wet bulb temperature when the air is saturated and also the
temperature that we would expect fog or clouds to form? - ✔✔Dew Point Temperature
✔✔Nearly all weather occurs within the __________ - ✔✔Troposphere
✔✔The two instruments used to measure atmospheric pressure - ✔✔1. Aneroid
barometer
2. Mercury barometer
✔✔Nearly half the weight or mass of the atmosphere is concentrated __________ -
✔✔In the lowest 18,000 feet of the atmosphere
✔✔On average, air pressure ________ approximately _________ every 1000 foot
increase in elevation within the lowest 10,000 feet of the atmosphere - ✔✔Decreases; 1
inch of mercury
✔✔Why do dry climates usually have greater temperature differences between night
and day than humid climates? - ✔✔There is less water vapor in the air to hold in heat at
night and reflect radiation during the day
✔✔What has a lower albedo, dark soil or a snow covered field? - ✔✔Dark Soil
✔✔What substances has the highest specific heat capacity? - ✔✔Water
✔✔How does evaporation affect the atmosphere - ✔✔It cools and moistens it
✔✔This accounts for small daily and seasonal temperature variations in high humidity
regions - ✔✔The greenhouse effect
✔✔Based on the normal daily temperature lag, when will the highest daytime
temperature most likely occur during summer? - ✔✔3 p.m.
✔✔The degree of hotness or coldness of a substance - ✔✔Temperature
✔✔The lowest temperature to which air can be cooled by evaporation - ✔✔Wet Bulb
ANSWERS SURE A+
✔✔On the average, RH _______ with each 20 degree decrease in temperature or
_______ with each 20 degree inrease in temperature. - ✔✔Doubles; Halves
✔✔True/ False
The highest relative humidity usually occurs with the highest temperature. - ✔✔False
✔✔True/False
Relative humidity is usually lower on north aspecs - ✔✔False
✔✔True/False
The type of vegetation has little affect on temperature and humidity. - ✔✔False
✔✔Define Relative Humidity - ✔✔The RATIO of the amount of moisture in the air,
RELATIVE to the maximum amount of moisture that air could contain if it were
saturated.
✔✔What is a good indicator of moisture in the air and changes little during the day if the
air mass is constant. - ✔✔Dew Point
, ✔✔True/False
Daily high temperatures are warmer on steep slopes than on flat fields in the same area
and at the same elevation - ✔✔False; there is more solar radiation on flat slopes
✔✔Two processes that can change the RH - ✔✔1. Change Temperature
2. Change Dew Point
✔✔What is identical to the wet bulb temperature when the air is saturated and also the
temperature that we would expect fog or clouds to form? - ✔✔Dew Point Temperature
✔✔Nearly all weather occurs within the __________ - ✔✔Troposphere
✔✔The two instruments used to measure atmospheric pressure - ✔✔1. Aneroid
barometer
2. Mercury barometer
✔✔Nearly half the weight or mass of the atmosphere is concentrated __________ -
✔✔In the lowest 18,000 feet of the atmosphere
✔✔On average, air pressure ________ approximately _________ every 1000 foot
increase in elevation within the lowest 10,000 feet of the atmosphere - ✔✔Decreases; 1
inch of mercury
✔✔Why do dry climates usually have greater temperature differences between night
and day than humid climates? - ✔✔There is less water vapor in the air to hold in heat at
night and reflect radiation during the day
✔✔What has a lower albedo, dark soil or a snow covered field? - ✔✔Dark Soil
✔✔What substances has the highest specific heat capacity? - ✔✔Water
✔✔How does evaporation affect the atmosphere - ✔✔It cools and moistens it
✔✔This accounts for small daily and seasonal temperature variations in high humidity
regions - ✔✔The greenhouse effect
✔✔Based on the normal daily temperature lag, when will the highest daytime
temperature most likely occur during summer? - ✔✔3 p.m.
✔✔The degree of hotness or coldness of a substance - ✔✔Temperature
✔✔The lowest temperature to which air can be cooled by evaporation - ✔✔Wet Bulb
