Intro Objective 02/16/2012 Describe the water cycle. Check and Hand-in Missing Assignments. What happens to water after you’ve used it? Where does it go?

THE WATER CYCLE

The Water Cycle  What is the “Water Cycle”?  Continuous circulation of water within Earth’s atmosphere, land, and oceans/lakes  Sun drives the water cycle  As water moves through the cycle it changes state

Water Cycle  Facts:  97% salt water  Oceans  Seas  Saltwater lakes  3% fresh water  Lakes  Rivers  Ice caps

The Water Cycle  Evaporation  Water evaporates into the air from large bodies of water such as oceans and lakes

The Water Cycle  Condensation  Water vapor condenses when it comes in contact with cool air, creating clouds

The Water Cycle  Precipitation  Rain, snow, sleet, or hail  Clouds become full of water and it falls to the ground  Precipitation over land is our primary source of freshwater

The Water Cycle  Infiltration  When water moves through pores and spaces in the soil  Caused by gravity  A.K.A. percolation

The Water Cycle  Runoff  When water returns to the ocean/lakes

The Water Cycle  Importance  Drives weather  Drives erosion  Cleans & Recycles water

Students will cut out and paste the water cycle picture in to their notebook. Label each section of the water cycle on the picture as follows: A. (Evaporation) B. (Condensation) C. (Precipitation) D. (Percolation) E. (Runoff) Use arrows for each part.

The Water Cycle  Summary: Answer the following in complete sentences…  What are the five steps to the water cycle?  What is the energy source for the water cycle?  Why is the water cycle important?

Objective 02/16/2012 Outro Describe the water cycle List all parts of your life that would be affected if the water cycle did not exist.