 Necessary materials: PowerPoint Guide Teacher Information!

The Water Cycle Soil and Water Resources Pgs in Ch. 13 of Managing Our Natural Resources

TRUE or FALSE… The amount of freshwater on our planet exceeds the amount that we use.

Students will be able to…  Explain the components of the water cycle.

Let’s review the WATER cycle

 70% of the earth’s surface  340 million cubic miles of water  constant amount 97%  oceans 2%  freshwater 1%  glaciers & icecaps  Amount available can change… Let’s review the WATER cycle

WATER The WATER Cycle

Evaporation Transpiration Ground water Precipitation Runoff Water vapor Percolation Soil water Ocean Lake

The WATER Cycle  Water continuously moves from place to place The WATER cycle = the hydrologic cycle  Powered by the Evaporation

The WATER Cycle  How does water return to the earth? Returned water  meteoric water  Transpiration  water lost from plants  Surface water  ponds, lakes, streams 30% of rainfall Used for agriculture, industry, domestic needs  Pollution  Much of the surface water is useless to us

The WATER Cycle  Groundwater  soaks into the earth 3 zones  Surface water  Aeration  Groundwater Water table  the top of an aquifer

Review  Can you explain the components of the water cycle?