section 4.2-the hydrosphere big idea: water shows itself in many different forms. get out a piece of...
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Section 4.2-The Hydrosphere
Big Idea: Water shows itself in many different forms.
Get out a piece of paper for 4.2 notes and write the Big Idea below.
Water on Earth
• 97% salty, 2% frozen fresh, 1% usable• Desalination-process used to remove salt from
fresh water• Amount of water never changes• Hydrologic Cycle-Water Cycle...Pg. 70
What are the forces that drive the hydrologic cycle and how does each force drive the cycle?
• Floods- Too much water and no where for it to go
Levees: man-made structures of dirt, rock and concrete
Levees are designed to protect habitat
Levees cause problems for civilians downstream
• Headwaters-tributaries-watershed (drainage basin)• Estuaries-form when river meets an inlet, or small arm,
of the sea… fresh and saltwater mix• Wetlands-any landscape that is covered with water for
at least part of the year– Many have been drained for farming and building
(Everglades)
• Groundwater- Water found below ground• Water table -area where ground underneath is completely
saturated-fluctuates based on amount of rain or well usage.
• Lowering of table could lead to settling, slumping or cracking.
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