Weathering
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Weathering
Weathering is the breaking down of substances such as rocks and minerals by physical, chemical, or biological processes.
Photo by Y. Ballester
What causes weathering?
Plants, animal life, the atmosphere, and water are the major causes of weathering.
Photo by Mouin.M►
Physical weathering
Physical weathering is a process that breaks rocks down or apart without changing their chemical composition.
Photo by Anna & Michal
Agents of physical weathering
Agents of physical weathering include temperature changes, pressure changes, plant and animal actions, water, wind, and gravity.
Chemical weathering
Chemical weathering is the breaking down of rocks by chemical reactions.
Photo by Paxson Woelber
Chemical weathering #1
Oxidation takes place when oxygen combines with other elements in rocks to form new types of rock. These new substances are usually much softer, and therefore easier for other forces to break apart.
Photo by subarcticmike
Chemical weathering #2
Carbonation is the combination of water with carbon dioxide to form carbonic acid. This type of weathering is important in the making of caves.
Photo by Graela
chemical weathering #3
Hydrolysis is the chemical breakdown of a substance when combines with water.
Photo by Camerons Personal Page
Erosion
Erosion is the wearing away of the land by forces such as water, wind, and ice.
Photo by Smart Destinations
Erosion agents
The five agents of erosion are wind, water, ice, waves and gravity. Water is one of the most important parts in erosion. Waves produce coastal erosion.
Photo by Peter Rivera
Erosion transportation
In order for erosion to occur it requires a transporting agent to carry the rock along. Erosion can be transported by water, wind, ice, and gravity.
Photo by Bert Kaufmann
Deposition
Deposition is the process by which rocks, sand and sediment are deposited by the forces of erosion.
Photo by Matthias Rhomberg
