Page 7 - SGG_220310Students_Presentation_Module 1
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WATER CYCLE
The natural water cycle describes the existence and movement
of water on, above, and below the surface of the Earth.
Earth's water is always in movement and is always changing
states, from liquid to vapor to ice and back again. The water
cycle has been working for billions of years and all life on Earth
depends on it.
Water is constantly circulating between the oceans, continents
and atmosphere in a system called the hydrologic cycle. Water
from the oceans and land is transported into the atmosphere
by evaporation.
Water returns to the earth's surface by precipitation.
