Water on the Earth Notes

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Water on the Earth Notes

• Earth Science
• Grade 8

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• The Earth is the only planet in the solar system
  to be covered in water.
• Water covers about 75 of the Earths surface.
• Any place on the Earth that contains water is
  called the hydrosphere.

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• Of the water on the Earth, 97 is salt water and
  3 is fresh.
• Almost 67 of all the fresh water is locked up in
  glaciers near the North and South Poles.
• That leaves just 1 of all the water on the
  planet available for plants and animals to live
  on.

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Water Percentages
33 of 3 only 1 for all plants and animals to
use
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Fresh water
97
33 available to use
67 locked in glaciers
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• Water constantly moves through the atmosphere by
  the water cycle.
• Water that does not soak into the ground or
  evaporate into the atmosphere is called runoff.
• RUNOFFRIVERS

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Water Cycle Animation

• Click here

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Four factors affecting absorption of rain

• Amount of rainfall

Heavy downpour A lot of runoff
Light, misty rain Little run off
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Four factors affecting absorption of rain

• Time span of the rain
• 2 inches of rain in 1 hour a lot of runoff
• 2 inches of rain in 1 week little runoff

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Velocity of the Rivers

• Fastest at 1) very center of the river
• 2)outside of the meander

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1
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Erosion/Deposition of a River

• Erosion occurs on the outside of the river
  meander
• Deposition occurs on the inside of the river
  meander

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Bed load and Suspended load

• Bed load material that rolls along the bottom of
  the river
• Suspended load material that floats suspended in
  the water

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Development of an Oxbow lake
1.
Oxbow lake cutoff meander
2.
3.
4.