2.  How are humans impacting the environment and how can we minimize the negative effect we have on ecosystems?  The Problems of the Earth: http://www.youtube.com/watch?v=3whBt kLueNQ

3.  What did you see in the video?  What’s causing it?

4.  How do you know it is “acidic”?

6.  Pollutants › Burning fossil › Nitrogen fertilizers Pollutants in atmosphere combine with water droplet = acid rain

7.  Water cycle!

8.  Share your ideas  Southern Europe, Eastern North America, Indian and China (Asia)

9.  p – potenz, H – hydrogen  Scale shows how strong acids are  Pure water: pH=7  Anything with a pH 7 is basic  Normal rain is 5.7, slightly acidic  Acid rain: pH=?

10.  pH indicators › Litmus paper  pH meter and probe

11.  pH lab  Technology?  Lab report format  Homework › Introduction: Background Questions