how are humans impacting the environment and how can we minimize the negative effect we have on...
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What did you see in the video? What’s causing it?TRANSCRIPT
Acid in the Water CycleSection 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! What did you see in the video? What’s causing it?
Can you name any Acidic Food?
How do you know it is “acidic”?
Acidic Food Example
Source of Acid Rain Pollutants
› Burning fossil › Nitrogen fertilizers
Pollutants in atmosphere combine with water droplet = acid rain
Where does acid rain go? Water cycle!
Consequences of Acid Rain Share your ideas Southern Europe, Eastern North
America, Indian and China (Asia)
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=?
pH Measurement pH indicators
› Litmus paper pH meter and probe
Next class... pH lab Technology? Lab report format Homework
› Introduction: Background Questions