Weathering and Erosion Weathering and Erosion Weathering and
- Slides: 24
Weathering and Erosion
Weathering and Erosion
Weathering and Erosion Weathering The process that breaks down rock and other substances at Earth’s surface
Weathering and Erosion The removal of rock particles by wind, water, ice, or gravity
Weathering and Erosion work together continuously to wear down and carry away the rocks at Earth’s surface
Weathering and Erosion Mechanical Weathering The type of weathering in which rock is physically broken into smaller pieces
Weathering and Erosion Mechanical Weathering The 5 main causes of mechanical weathering are:
Weathering and Erosion Mechanical Weathering #1 Freezing and Thawing
Weathering and Erosion Mechanical Weathering #2 Release of Pressure
Weathering and Erosion Mechanical Weathering #3 Plant Growth
Weathering and Erosion Mechanical Weathering #4 Actions of animals
Weathering and Erosion Mechanical Weathering #5 Abrasion
Weathering and Erosion Chemical Weathering The process that breaks down rock through chemical changes
Weathering and Erosion Chemical Weathering The 5 main causes of chemical weathering are:
Weathering and Erosion Chemical Weathering #1 Water weathers rocks by dissolving it
Weathering and Erosion Chemical Weathering #2 Oxygen combines with iron in the presence of water in a process called oxidation
Weathering and Erosion Chemical Weathering #3 Carbon Dioxide Carbon dioxide gas combines with water to form carbonic acid
Weathering and Erosion Chemical Weathering #4 Living organisms Plants and lichens (plantlike organisms) grow on rocks and produce weak acids that chemically weather rock
Weathering and Erosion Chemical Weathering #5 Acid Rain Gasses from the burning of fossil fuels combine with water vapor to form acids and then acid rain
Weathering and Erosion Rate of Weathering The most important factors that determine the rate at which weathering occurs are the type of rock and the climate
Weathering and Erosion Rate of Weathering Type of Rock make of minerals that do not dissolve easily in water weathers slowly Rock make of minerals that dissolve easily in water weathers faster
Weathering and Erosion Rate of Weathering Type of Rock that is permeable (full of tiny holes, or air spaces) weathers at a fast rate
Weathering and Erosion Rate of Weathering Climate Both chemical and mechanical weathering occur faster in wet climates
Weathering and Erosion Rate of Weathering Which type of stone weathers faster? Tombstones are same age, same cemetery
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