Chemical Weathering What is it? How does it happen? What do the effects look like? What is it? How does it happen? What do the effects look like?

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    24-Dec-2015

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  • Slide 1
  • Chemical Weathering What is it? How does it happen? What do the effects look like? What is it? How does it happen? What do the effects look like?
  • Slide 2
  • Chemical Weathering Chemical weathering is breaking down rock by chemical changes Chemical weathering is breaking down rock by chemical changes
  • Slide 3
  • What factors contribute to chemical weathering? Water Oxygen Carbon dioxide Living things produce chemicals Acid rain Water Oxygen Carbon dioxide Living things produce chemicals Acid rain
  • Slide 4
  • Water Water is the most important cause of chemical weathering. Water breaks down rock by DISSOLVING it:
  • Slide 5
  • Chemical Weathering: water
  • Slide 6
  • Chemical weathering: oxygen Oxygen can cause chemical changes to rock: rocks that contain iron look rusty
  • Slide 7
  • Chemical weathering: oxygen Rocks that contain copper tend to turn green:
  • Slide 8
  • Chemical Weathering The atmosphere naturally contains CO 2 Carbon dioxide in the atmosphere is dissolved by rainwater, and can cause both man-made and natural features to chemically weather. The atmosphere naturally contains CO 2 Carbon dioxide in the atmosphere is dissolved by rainwater, and can cause both man-made and natural features to chemically weather.
  • Slide 9
  • Chemical weathering: plants and microbes Living things produce acids that can speed up weathering:
  • Slide 10
  • Chemical weathering: acid rain The CO 2 and sulfur compounds in the atmosphere have increased significantly since the industrial revolution:

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