1. The Hydrosphere & Water Cycle
Section 3.3 continued

2. 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

3. The Water Cycle
Water continuously moves between the oceans, the atmosphere, and land—sometimes outside of living organisms and sometimes inside of them

4. 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.

5. 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

6. 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