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Weather Chapter 2

water cycle the continuous movement of water from water sources, such as lakes and oceans, in to the air, onto and over land, into the ground, and back to the water sources.
weather the condition of the atmosphere at a particular time and place.
humidity the amount of water vapor or moisture in the air.
relative humidity the amount of moisture the air contains compared to the maximum amount given as a percentage
condensation process by which a gas, such as water vapor, becomes a liquid. It occurs when saturated air cools further
dew point the temperature to which air must cool to completely be saturated.
cloud is a collection of milliions of tiny water droplets or ice crystals
precipitation water, in solid or liuied form, that falls from the air to the Earth
air mass a large body of air that has similar temperature ad moisture throughout
maritime forms over water
continental forms over land
polar forms over the polar regions; cold
tropical forms over the Tropics; warm
front the boundary that forms when two different air masses meet
cold front cold air mass meets and displaces a warm air mass; produces thunderstorms, heavy rain, or snow; cooler weather usually follows
warm front warm air mass meets and overrides a cold air mas; generally bring drizzly precipitation; after it passes, weather conditions are clear and warm
occluded front faster moving cold air mass from two directions that forces warm air up; cool temperatures and large amounts of precipitation
stationary front cold air mass meets a warm air mass with little to no horizontal movement; weather is similar to that produced by a warm front.
Created by: MrsDalling