Water Cycle

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Water Cycle
The Hydrologic Cycle
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Evaporation

• Heat energy from the sun causes water in puddles,
  streams, rivers, seas, oceans or lakes to change
  from a liquid to water vapor (a gas).
• This is called evaporation.

• The vapor rises into the air and collects in
  clouds.  

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Transpiration

• Transpiration is the process by which plants lose
  water out of their leaves. 
• Transpiration gives evaporation a bit of a hand
  in getting the water vapor back up into the air.

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Condensation

• As water vapor rises and cools, it collects
  around dust particles (or condenses) and
  forms clouds.

This is called condensation.
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Precipitation

• When clouds are saturated gravity pulls the water
  to the earth. Mainly as rain, but sometimes as
  snow, sleet, and hail.

• This is called precipitation.

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2 types of Run Off

• Surface run off movement of water on Earths
  surface to collect in rivers, streams, lakes and
  oceans.
• Subsurface run off movement of water beneath the
  Earths surface that eventually collects in
  aquifers and springs.

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Accumulation

• a.k.a. collection
• Water collects in rivers, lakes, streams, and the
  ocean.

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Accumulation
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0.5 Consumable 0.5 Non-consumable
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How is water distributed on the Earth?

• 97 of the worlds Water supply is salt water
  (seas and oceans).
• 2 of the worlds water supply is fresh and
  frozen in icecaps and glaciers.

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How is water distributed on the Earth?

• 0.5 of the worlds water supply is
  non-consumable water on land, water in atmosphere
  or dirty water
• 0.5 of the worlds water supply is freshwater
  available for consumption.(lakes, rivers,
  streams, groundwater)