Write responses on board. Ask for examples of pollution, clarifying any misconceptions. Ask for examples of water pollution they know of. Discuss water pollution and how water becomes polluted. Discuss the dangers of water pollution and the importance of water for human survival.
State waters biological significance.
Ask how water effects our lives. Many answers will follow. To give students a specific responsibility while viewing have students document how many different forms and uses of water they see during the clip. STOP video after the images of water in different forms clouds, snow, rain, ice, rivers, lakes, and oceans. Discuss the different forms of water and its importance in all of our lives.