Earth: The Water Planet

1
Earth The Water Planet

• What percent of the water on Earth is good enough
  to drink?

2
Water on Earth

• 97 Salt Water, Oceans, Seas, some lakes and
  groundwater
• 2.4 Glaciers and Ice Caps
• 0.57 Fresh water that is unavailable, Too
  far underground or polluted
• 0.03 Water To Drink

3
The Hydrologic Cycle

• AKA The Water Cycle

4
Aquifer
5
Places Water is stored

• Reservoirs
• Aquifer
• Rivers, Streams
• Lakes
• Oceans
• Glaciers Ice Caps
• Plants and Animals

6
Aquifer

• Water stored in the ground
• Ground water

7
Glaciers and Ice Caps

• Glaciers and Ice Caps hold (or held) about 80 of
  all fresh water on Earth.
• However they are shrinking fast due to global
  warming.

8
How Water Moves

• Precipitation
• Evaporation
• Condensation
• Percolation
• Transpiration
• Irrigation
• Ground water pumping (Wells)
• Run Off

9
Percolation

• When water moves downward between spaces in the
  soil and bedrock.

10
Permeable

• Something that water can pass though

11
Impermeable

• Something water can not pass through

12
Transpiration

• The movement of water by plants as they breath.
  Water is drawn up from the soil by roots and
  exhaled through leaves as the plant breaths.

13
Irrigation

• To supply water to crops and such by pumping or
  diverting it from a river or other body of water

14
Run Off

• When water travels over the surface of the ground
  (after a hard rain)
• Water can collect contaminates like oil and
  gasoline from roads and animal wastes from yards
  and farms. (this is an example of non-point
  pollution)

15
Non-point Pollution
Pollutants from a source that is difficult to
pinpoint. They include chemicals from lawns and
fields, trash, oil, and animal and human wastes.
Typically, water running off of streets, parking
lots, yards, construction sites and agricultural
lands sweep these pollutants into bodies of water
when it rains. About 70 percent of pollution in
the nation's waters come from nonpoint
sources.www.lcra.org/water/glossary.html
16
Point Pollution

• Pollution that can be traced to a single source
  or point, such as a sewage treatment plant,
  outfall, or other discharge pipe.