•In what forms and where do we find water on Earth?•What are the causes and effects of floods?
Forms saltwater—97 percent of world’s water freshwater—most frozen in ice caps; less than
1 percent in vapor and liquid form Where liquid fresh water is found
surface water—in rivers, lakes, estuaries, wetlands
groundwater—stored in soil and water table
Causes—heavy rains, sudden snow melts; human activity may contribute
Effects—erosion, loss of vegetation, death and destruction
SECTION 2The Hydrosphere
Evaporation:energy transforms water into vapor.
Condensation:as water vapor rises it forms droplets.
Surface Water
Precipitation:droplets may become heavy enough to fall as rain, snow, or hail.
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