| A | B |
|---|
| Absolute Humidity | a measure of the mass of water vapor in a volume of air |
| Air Pressure | the pressure exerted in every direction by the air |
| atmosphere | the layers of gases that surround Earth which include the troposphere, stratosphere, mesosphere, and thermosphere |
| Blizzard | severe storm characterized by strong winds and heaby snow |
| Climate | average condition of the weather in a region over a period of years |
| Condensation | a change of state from gas to liquid caused by the loss of heat energy in the gas |
| Conduction | the transfer of heat energy between atoms and molecules that occurs within an object or between objects that touch |
| Coriolis Effect | Spiraling winds produced by Earth's rotation |
| Cyclone | term used for a tropical cyclone that forms in the Indian Ocean or South Pacific Ocean |
| Density | A measure of mass per unit of volume |
| Deposition | the process by which snow and frost form when water vapor changes directly to a solid state |
| dew | moisture that has condensed on objects near the ground whose temperatures have fallen below the dew point temperature |
| dew point | the temperature at which water vapor begins to condense into liquid water |
| Doppler Radar | enhanced radar that can detect storm location intensity and amount of precipitation wind speed and direction toward and away from the radar site. |
| dropsonde | a weather detection device designed to be dropped from a hurricane hunter aircraft to collect data on tropical storm conditions as the deviced falls to earch |
| drought | a prolonged period of below-normal rainfall over a large geographic area with severe effects including a shortage of fresh water for consumption and crop loss |
| dry line | a boundary at which moist air mets dry |
| EF-Scale | the Enhanced Fujits Scale used to classify tornadoes |
| Electromagnetic specturm | a system that classifies the different forms of electromagnetic radiation according to wavelength |
| evaporation | a change of state from liquid to gas caused by the gain of heat energy in the liquid |
| Eye | Circular region locagted at the center of a hurricane |
| Eyewall | region of tall clouds heavy rain and strong winds surrounding a hurrican's eye |
| flood | any unusually high flow overflow or inundation by water that causes or threatens to cause damage |
| fog | water droplets suspended in the air at Earth's surface |
