4th Grade-Science-Weather-Study Guide
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air pressure
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The force or pressing of air on the earth's surface
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anemometer
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An instrument used to measure wind speed
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air mass
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A large body of air that has similar temperature and humidity
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meteorologist
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A scientist who studies weather
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humidity
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The amount of water vapor in the air
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rain gauge
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An instrument used to collect and measure precipitation or rain
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wind vane
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An instrument used to measure measures wind direction
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front (weather)
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The meeting of two air masses
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barometer
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An instrument used to measure air pressure
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forecast
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To predict the type weather it will be in the next few days
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precipitation
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Any form of water that falls from clouds and reaches Earth's surface. ex. snow, hail, sleet, and rain
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Cirrus
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A type of cloud. 1. Color: White 2. Location: High in the sky 3. Visual: Feathery
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Cumulus
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A type of cloud. 1. Color: White 2. Location: Low in the sky 3. Visual: Puffy cotton balls
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Stratus
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A type of cloud. 1. Color: Grayish 2. Location: Low in the sky 3. Visual: Flat sheet of clouds
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Water Cycle
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The continuous process by which water moves from Earth's surface to the atmosphere and back
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Condensation
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The change from a gas to a liquid (In the water cycle: evaporation to condensation to precipitation)
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Runoff
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Water that flows over the ground surface into such bodies of water that include: ocean, lakes, and river.
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Evaporation
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A process by which the sun heats up water in rivers or lakes or the ocean and turns it into a vapor or steam. The water vapor or steam then goes into the air.
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What causes wind?
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The constant raising of hot air and the falling cold air to the surface of the earth.
