RESOURCES & ENVIRONMENT

CH. 4. SOLAR ENERGY

http://cafe.naver.com/ArticleRead.nhn?clubid=18639531&page=1&menuid=21&boardtype=L&articleid=805

4-1. WATER CYCLE

4-1-1. Water

H2O

http://cft.fis.uc.pt/eef/FisicaI01/fluids/thermo20.htm

Water on Earth

Sea water(1.37*109 km3)

Terrestrial water

Surface water (2.3*105 km3)

Groundwater (8.4*106 km3)

Glacier/Ice/Snow(2.9*107 km3)

Vapor(1.3*104 km3)

http://water.usgs.gov/edu/watercyclesummary.html

4-1-2. Significance of Water

• Essential constituents of life forms

• Niches for various organisms

• Climate (esp. temperature) controller

• Reservoir of many invaluable resources

• Transport medium for material cycles

4-1-3. Water Cycle

http://water.usgs.gov/edu/watercyclesummary.html