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Water Cycle & Weather Chapter 6

Water Cycle & Weather Chapter 6. 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). Atlantic & Pacific Oceans.

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Water Cycle & Weather Chapter 6

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  1. Water Cycle & WeatherChapter 6

  2. 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)

  3. Atlantic & Pacific Oceans

  4. Arctic & Indian

  5. Southern Ocean < 1% Oceans Seas 97% • Lakes • Rivers

  6. “Water, water, everywhere, Nor any drop to drink” Salt Water Fresh Water

  7. Salt v. Fresh Water table • 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

  8. Saltiness MORE 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 • 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

  9. 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

  10. Water Cycle

  11. 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

  12. Sun’s Energy = powers the water cycle

  13. Review

  14. 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

  15. Air Pressure • Air pressure is all around us • It pushes down, up, and sideways • Air pressure changes with temperature • It becomes more or less dense, creating high or low pressure • These changes cause movement • As the movement changes, the weather changes

  16. L3 Air Masses

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