Question

Difference between chemical weathering and physical weathering

Answer 1

Difference Between Chemical and Physical Weathering. Weathering processes crack, wear away, and weaken rocks. ... Physical and chemical weathering degrade rocks in different ways. While physical weathering breaks down a rock's physical structure, chemical weathering alters a rock's chemical composition.

Answer 2

Physical (mechanical) weathering

Physical (mechanical) weatheringPhysical weathering is also known as mechanical weathering. This type of weathering occurs when rocks and other landforms are broken down by physical factors in the environment. These physical factors include the wind, water, the sun, ice and temperature changes. This type of weathering does not change the chemical composition of the rock or minerals. An example would be waves crashing against a rocky shoreline, slowly breaking apart the rocks into smaller pieces.

Chemical weathering

Chemical weatheringChemical weatheringChemical weathering occurs when there are changes in the chemical compositions of the rock or minerals from exposure to the environment. Chemical weathering includes chemical changes that may decompose, dissolve or break down various parts of the rock or another landform. These changes are a result of other minerals and chemicals that seep into rocks, usually in rain water or as gases. Acid rain is a prime cause of chemical weathering.

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