Water Cycle & Weather Chapter 6
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Transcript of Water Cycle & Weather Chapter 6
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Water Cycle & WeatherChapter 6
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L1 Where is Earth’s water?Earth – The water planet– People use water to travel– ¾ of surface is covered by water– It provides a home & food– 3 states of water
• Solid (frozen)• Liquid (melted)• Gas (invisible water vapor)
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Atlantic & Pacific Oceans
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Arctic & Indian
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Southern Ocean
< 1%
• Oceans • Seas
97%
• Lakes • Rivers
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“Water, water, everywhere, Nor any drop to drink”
Salt Water Fresh Water
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Salt v. Fresh• Most of the fresh
water is frozen in the polar ice caps and glaciers
• You cannot drink salt water
• It has dissolved solids in it– Salt from rocks &
soil– Rivers carry salt to
the ocean– We use ocean salt
on food
Water table
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Saltiness
MORE• Warm places where water
evaporates quickly allows more salt to be quickly left behind (salt does not evaporate)
• Red Sea is very salty because there are deserts on three sides
• Most of Earth’s water is salty ocean water
LESS• Ocean water is less salty
near the North and South Poles where the water evaporates less quickly
• Fresh water is found in glaciers and ice caps but it is not safe to drink
• Safe fresh water is found underground or in lakes, rivers, and streams
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L2 Water Cycle• Water is recycled• No new water is created• Water is cleaned through the water cycle• Water is always moving– The movement is called the water cycle
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Water Cycle
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The Water Cycle
• Evaporation – process of changing liquid water to water vapor when it is heated
• Condensation – process of water vapor becoming liquid water when it cools
• Precipitation - any form of water that falls to Earth
• Storage (collection) – water from precipitation sinks into soil, or it falls, flows, or seeps into the ocean
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Sun’s Energy = powers the water cycle
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Earth’s Atmosphere
• The protective blanket that surrounds Earth
• It has mass and takes up space
• Is a mixture of gases• The layer closest to us
has water vapor• Gravity pulls the mass
of air to the surface
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Cumulus Clouds
• Thick clouds, white, & puffy, like piles of cotton, they appear in fair/good weather and may reach high in the sky
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Stratus Clouds
• Flat layers of clouds, that form close to Earth’s surface
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Cirrus Clouds
• Feathery clouds that form high in the atmosphere when water vapor turns to tiny crystals of ice
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L4 meteorologists
Ben Tanner, WIS-10• Study weather
conditions, they look at temperature, water, and air movement, data is collected automatically at weather stations
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barometer
• Air pressure affects weather
• Air pressure is measured by a tool called a barometer
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anemometer
• Wind affects weather• Wind speed is measured by a tool called an anemometer
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Wind vane• A wind vane
shows the direction from which the wind is blowing
• The pointer points into the wind
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Weather maps
• Use symbols to show fronts and weather conditions in different places