Chapter 2 Test Review-Weather Tools A B a large body of air that has the same properties as Earth's surface over which it develops air mass violent, whirling wind that moves in a narrow path over land tornado rain, snow, sleet, and hail precipitation measure of the amount of water vapor that air is holding compared to the amount it can hold at a specific temperature relative humidity layered cloud stratus feathery cloud cirrus line that connects points of equal temeprature isotherm puffy clouds cumulus raindrops that pass through a layer of freezing air near the groun sleet temperature where water vapor condenses dew point issued when severe weather conditions exist and immediate action should be taken warning issued when conditions are favorable for something to happen watch measures air pressure barometer measures wind speed anemometer refers to the state of the atmosphere at a specific time and place weather found on a map as a blue line with triangles cold front found on a map as a red line with semicircles warm front