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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