1. Ch 11 Water
Page 289

2. The water planet Water is essential for life
You can go a month without food, but only days without water!
Two kinds of water:
Fresh Water Salt water
= contains little salt = contains higher concentration salt
Needed for:
Drinking
Agriculture

3. The water cycle
Water is recycled and renewable!

4. Global Water Distribution
Use pic on page 290
97% salt water
3 % fresh water
99% of this: frozen and underground
1% fresh and available above ground

5. Surface Water = fresh water found on the surface of earth
Most cities depend on surface water for their supplies
River systems = network of rivers/streams that move across the land
Water sheds = area of land that drains into a river.
Much of our pollution in rivers comes from the rivershed.

6. Ground Water = water beneath the Earth’s surface
Water table = level where the rocks and soil are saturated with water
(highest point of water underground)
Aquifers = underground formation that has groundwater in it
Porosity and Permeability = amount of spaces in the soil
= ability to flow thru the soil or material
Recharge Zone = area in watershed that has permeable ground in which water will fill up aquifers
Wells = hole dug into ground to reach water underground