1. Acid Rain and Buffers 1

2. Please complete the “Participant Card” 2

3. Put your student hat on Experience the kit Put your teacher hat on Envision classroom use Curriculum integration Support for students 3

4. Acid Rain and Buffers Student Handouts SafetyQuick Guide Student Instructions Turn to this page 4

5. The burning of fossil fuels such as coal, heating oil and gasoline releases chemicals into the atmosphere. These chemicals combine with water vapor in the air to form acid rain that harms the environment. The effect of acid rain on a lake may be reduced through natural buffers present in some materials on the bottom of the lake. Buffers are chemicals that act to keep the pH of a solution relatively constant. In this activity, you will determine which type of lake bottom material (sand or limestone) is best for buffering the effects of acid rain.

6. A.Investigate the effects of acid rain on lakes with sand bottoms Prepare a model “lake” with sand: Simulate acid rain by adding drops of acid to the model “lake”

7. B.Investigate the effects of acid rain on lakes with limestone bottoms Prepare a model “lake” with limestone: Simulate acid rain by adding drops of acid to the model “lake”

8. Teacher Information 8 Quick Guide MSDS Key Safety

9. Purchase kits from 9 www.sciencetakeout.com

10. Individual Assembled Kits Fully assembled individual kits Unassembled Packs All supplies needed to make 10 kits Refill Packs All supplies needed to refill 10 kits

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13. Thanks for being a GREAT group!!! 13 Please turn in your participant card before you leave.