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The Hydrosphere & Water Cycle
Section 3.3 continued
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Hydrosphere Includes all of the water on or near the earth’s surface: oceans, lakes rivers, wetlands, polar ice caps, and clouds Part of the biosphere Water continually cycles throughout the hydrosphere All living things need water for survival
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The Water Cycle Water continuously moves between the oceans, the atmosphere, and land—sometimes outside of living organisms and sometimes inside of them
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Water is crucial to life on our planet.
The average human body is made up of about 70% water. Water is used in just about every chemical process that goes on in an animal’s body.
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Parts of the Water Cycle
Evaporation- water goes from a liquid to a gas Transpiration-plants release excess water from their pores (biological process) Precipitation- water leaves the atmosphere (the clouds) in the form of rain, ice, sleet, snow Condensation- water goes from a gas to a liquid (clouds form) Runoff- excess water drains down mountains, valleys, etc… into water sources (lakes, oceans, rivers) Percolation- water seeps into the ground
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Oceans The world ocean covers a little over 70% of the Earth’s surface
It plays a crucial role in regulating the planet’s environment Temperature regulator- absorbs and stores the energy from the sun Absorbs ½ of the solar radiation that reaches Earth’s surface
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