Chemical WeatheringChemical 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?
Chemical WeatheringChemical Weathering
Chemical weathering is…
…breaking down rock by chemical changes
Chemical weathering is…
…breaking down rock by chemical changes
What factors contribute to chemical weathering?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
WaterWater
Water is the most important cause of chemical weathering. Water breaks down rock by DISSOLVING it:
Water is the most important cause of chemical weathering. Water breaks down rock by DISSOLVING it:
Chemical weathering: oxygenChemical weathering: oxygen Oxygen can cause chemical changes to rock: rocks that contain
iron look rusty
Oxygen can cause chemical changes to rock: rocks that contain iron look rusty
Chemical weathering: oxygenChemical weathering: oxygen Rocks that contain copper tend to turn
green:
Rocks that contain copper tend to turn green:
Chemical WeatheringChemical Weathering
The atmosphere naturally contains CO2
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 CO2
Carbon dioxide in the atmosphere is dissolved by rainwater, and can cause both man-made and natural features to chemically weather.
Chemical weathering: plants and microbesChemical weathering: plants and microbes Living things produce acids that can speed up weathering: Living things produce acids that can speed up weathering: