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Weather 2;3-2;4

Weather Vocab and Summaries 2;3-2;4

wind The horizontal movement of air from an area of high pressure to an area of lower pressure.
anemometer An instrument used to measure wind speed.
wind-chill factor Increased cooling caused by the wind.
local wind Winds that blow over short distances.
sea breeze The flow of air from an ocean or lake to the land.
land breeze The flow of air from land to a body of water.
monsoon Sea and land breezes over a large region that change direction with the seasons.
global wind Winds that blow steadily from specific directions over long distances.
coriolis effect The way Earth’s rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left.
latitude The distance from the equator, measured in degrees
jet streams Bands of high-speed winds about 10 kilometers above Earth’s surface.
evaporation The process by which water molecules in liquid water escape into the air as water vapor.
humidity A measure of the amount of water vapor in the air.
relative humidity The percentage of water vapor in the air compared to the maximum amount the air could hold at that temperature.
psychrometer An instrument used to measure relative humidity, consisting of a wet-bulb thermometer and a dry-bulb thermometer.
condensation The process by which molecules of water vapor in the air become liquid water.
dew point The temperature at which condensation begins.
cumulus Clouds that form less than 2 kilometers above the ground and look like fluffy, rounded piles of cotton.
stratus Clouds that form in flat layers.
cirrus Wispy, feathery clouds made mostly of ice crystals that form at high levels, above about 6 kilometers.
What causes wind? The horizontal movement of air from an area of high pressure to an area of lower pressure. Differences in air pressure.
What does an anemometer do? Measures air speed.
What is the wind-chill factor? The increased cooling that a wind can cause. The wind blowing over your skin removes body heat.
What causes local winds? Winds that blow over short distances. Caused by unequal heating of Earth's surface within a small area.
What is a sea breeze? A wind that blows from the ocean onto land.
What is a land breeze? A wind that blows from land to a body of water.
What is a global wind? Winds that blow steadily from specific directions over long distances.
What is the Coriolis effect? It is the way Earth's rotation makes winds curve.
Who was the Coriolis effect named after? A French mathematician who studied and explained it in 1835.
What are the major global wind belts? Trade winds Prevailing westerlies Polar easterlies
Where is wind the weakest? 30N or 30S
What tow winds play an important part in the weather in the U.S.? Prevailing Westerlies Polar Easterlies
What is the jet stream? About 10 km above Earth's surface are bands of high-speed winds.
What happens after evaporation occurs? Condensation
Why do you feel uncomfortable when being outside on a humid day, rather than a day with dry air? Evaporation slows down causing a less cooling effect on your body.
How are clouds formed? Clouds form when water vapor in the air becomes liquid water or ice crystals.
What are the 3 main types of clouds that are associated with weather? Cumulus Stratus Cirrus
What is fog? Fog are clouds that form at or near the ground.
Created by: krugeli
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