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D - Science - Unit 7
Unit 7 Vocab - Part 1
| Term | Definition |
|---|---|
| Water cycle | the movement of water between the atmosphere and earth's surface |
| Evaporation | it the process by which water molecules in liquid water escape into the air as water vapor |
| Condensation | the process by which molecules of water vapor in the air become liquid water |
| Humidity | is the measure of the of the amount of water vapor in the |
| Relative Humidity | is the percentage of water vapor that is actually in the air compared to the maximum amount of water vapor the air can hold at a particular temperature |
| Dew point | the temperature at which condensation begins |
| Precipitation | any form of water that falls from clouds and reaches earth's surface |
| Cirrus Clouds | wispy, feathery clouds made mostly of ice crystals that form at high levels |
| Cumulus Clouds | fluffy, white clouds usually with a flat bottom, that looks like rounded piles cotton |
| Cumulonimbus Clouds | towering clouds with flat tops |
| Stratus Clouds | clouds that form in flat layers and often cover much of the sky |
| Air Mass | a huge body of air that has similar temperature, humidity, and air pressure throughout |
| Tropical | a warm air mass that forms in the tropics and has low air pressure |
| Polar | a cold air mass that forms north of 50 degrees north latitude and south of 50 degrees south latitude and has high air pressure |
| Maritime | a humid air mass that forms over oceans |
| Continental | a dry air mass that forms overland |
| Maritime Tropical Air Mass | warm, humid air masses form over tropical oceans |
| Maritime Polar Air Mass | cool, humid air masses form over icy cold north pacific and north atlantic oceans |
| Continental Tropical Air Mass | hot, dry air mass form mostly in summer over dry areas of the south west and northern mexico |
| Continental Polar Air Mass | cold, dry air masses form over central and northern canada and alaska |
| Psychrometer | the instrument that measures relative humidity |
| Dew | liquid water that condenses from the air onto a cooler surface |
| Frost | ice that has been deposited on a surface that is below freezing |
Created by:
lprinke
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