The Earth

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The Earths Water
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• Oceans, lakes, rivers, and other bodies of water
  make up the earths hydrosphere
• The total amount of water on the earth does not
  change, but the water is constantly moving
• The Water Cycle shows the regular movement of
  water

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The Water Cycle

• The sun evaporates the water from oceans, lakes,
  and streams
• Changes it from liquid to vapor, or gas
• Warm air carries more water vapor than cold air
• Excess vapor changes into liquid water -
  condensation

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The Water Cycle

• Drops of water come together to create clouds
• When there is too much water in the clouds, it
  falls to the earth as precipitation rain, snow,
  or sleet depending on temperature

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Bodies of Water

• The earth is 70 water almost all of it salt
  water
• Four oceans Pacific, Atlantic, Indian, and
  Arctic
• The Pacific is larger than all the earths land
  combined

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• Seas, gulfs, and bays smaller than oceans
  partially enclosed by land
• 97 of the earths water is salt water
• To make this water drinkable, it goes through the
  process of desalination removing the salt
• Very expensive

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Fresh water

• 3 of the earths water supply is fresh water
• Most of this is in glaciers and ice caps
• The rest is found beneath the earths surface, in
  aquifers, or in lakes rivers