| A | B |
|---|
| Fronts | boundary between 2 air masses |
| trade winds | steady wind speed, warm, air sinks and moves to equator |
| prevailing westerlies | wind that moves from the subtropical highs to the poles |
| Cold front | heavy air, sinks moves against ground, pushes up warm air, rain |
| Warm front | light air, less ground friction, gentle slope, slowly overtakes cold air |
| stationary front | 2 air masses meet, don't move, similar temp. and pressure |
| drought | extended periods of time without rainfall |
| heat wave | extended periods of time with extremely high temps. |
| wind-chill factor | estimates heat loss from human skin caused by cold and wind |
| station model | uses symbols on a map to record weather data for a certain city |
| contrast | differences, dissimilar qualities |
| stratus clouds | sheets or layers, close to the earth's surface |
| cumulus clouds | low-level, billowy & puffy, resembles cotton balls and dark bottom |
| cirrus clouds | feathery cloud that is composed of ice crystals, highest altitude of any clouds |
| precipitation | rain, sleet, snow, hail |
| coalescence | smaller droplets combine together to form a larger droplet |
| supercooling | happens when a substance is cooled below its freezing pt and skips from a gas to a solid |
| condensation nuclei | solid particle in the atmosphere that provides the surface on which water vapor condenses (starts cloud forming) |
| fog | low lying cloud |
| cloud | collection of small water droplets or ice crystals suspended in the air |
