Natural Sources of Water

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Natural Sources of Water

• What is a natural source of water?
• Where on Earth do I find this water?

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Oceans

• About 71 of the Earth is covered by oceans.
• Ocean water is salty.
• The Earths oceans are connected and form a
  continuous body of water.

• Until the year 2000, there were four recognized
  oceans the Pacific, Atlantic, Indian, and
  Arctic.
• In the Spring of 2000, the International
  Hydrographic Organization recognized a new ocean
  the Southern Ocean.

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Oceans
Arctic
Atlantic
Pacific
Indian
Southern
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Seas

• There are also many seas.
• Seas are smaller branches of an ocean.
• Seas are often partly enclosed by land.
• The largest seas are the South China Sea, the
  Caribbean Sea, and the Mediterranean Sea.

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Seas
North Sea
South China Sea
Mediterranean Sea
Caribbean Sea
Tasman Sea
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Rivers

• A river is a natural stream of water, usually
  freshwater, flowing toward an ocean, a lake or
  another stream.
• Usually larger streams are called rivers while
  smaller streams are called creeks, or brooks.

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Rivers
Major Rivers of The World
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Rivers of Texas
Which river do you live near?
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Lakes

• A lake is an inland body of water that is not
  part of the ocean.
• They larger and deeper than a pond.
• Most lakes on Earth are freshwater.
• More than 60 of the Earths lakes are in Canada.

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Lakes

Crater Lake Oregon
Great Salt LakeUtah
Lake Michigan Michigan, Wisconsin, Illinois,
Indiana
Lake Tahoe Nevada, California
Caddo Lake Texas
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Ponds

• A pond is a body of water smaller than a lake.
• Ponds are sometimes defined as a man-made or
  natural body of water that is between 1m2 and 2
  hectares in area, and holds water for four months
  of the year or more.
• 1m2 is about this big, 2 hectares is about the
  
  size of two track fields

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Canals

• Canals are artificial channels for water.
• There are two types of canals
• Irrigation canals, which are used for the
  delivery of water
• Waterways, which are navigable transportation
  canals used for passage of goods and people,
  often connected to existing lakes, rivers or
  oceans.

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Glaciers

• Presently, 10 of land area is covered with
  glaciers.
• Glaciers store about 75 of the world's
  freshwater.
• In the United States, glaciers cover over 75,000
  square kilometers, with most of the glaciers
  located in Alaska.
• Glacial ice often appears blue when it has become
  very dense.

Mt. Cook New Zealand
Mt. Hood Oregon
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Polar Ice Caps

• Earths north pole is covered by floating pack
  ice (sea ice) over the Arctic Ocean.
• The land mass of the Earth's south pole in
  Antarctica, is covered by the Antarctic Ice
  Sheet.
• An iceberg is a large piece of freshwater ice
  that has broken off from a snow-formed glacier or
  ice shelf and is floating in open water.

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Aquifers

• An aquifer is an underground layer of rock that
  allows water to drip through it.
• It can also be an area of gravel, sand, silt or
  clay from which groundwater can be extracted
  using a water well.

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Puddles?

• A puddle is a small accumulation of water,
  uncontained on a surface.
• It can form either in little hollow areas in the
  surface, or directly upon the flat surface.
• A puddle is generally considered to be small
  enough to step over or shallow enough to walk
  through.
• Puddles commonly form during rainstorms.

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What Natural Sources of Water do You Have in Your
Area?