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Acid in the Water Cycle

Acid in the Water Cycle. Section 5.16. Human Activities Can Alter the Environment. 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=3whBtkLueNQ. Discuss!.

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Acid in the Water Cycle

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  1. Acid in the Water Cycle Section 5.16

  2. Human Activities Can Alter the Environment • 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=3whBtkLueNQ

  3. Discuss! • What did you see in the video? • What’s causing it?

  4. Can you name any Acidic Food? • How do you know it is “acidic”?

  5. Acidic Food Example

  6. Source of Acid Rain • Pollutants • Burning fossil • Nitrogen fertilizers Pollutants in atmosphere combine with water droplet = acid rain

  7. Where does acid rain go? • Water cycle!

  8. Consequences of Acid Rain • Share your ideas • Southern Europe, Eastern North America, Indian and China (Asia)

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

  10. pH Measurement • pH indicators • Litmus paper • pH meter and probe

  11. Next class... • pH lab • Technology? • Lab report format • Homework • Introduction: Background Questions

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