Question

What are the differences between physical and chemical weathering?

Answer 1

Answer:

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Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it to fall away.

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Answer 2

Explanation:

Physical weathering

• It is the breakdown of rocks without changing their chemical composition, through the action of physical forces.
• The constant freezing and thawing of rocks during the night and day leads to the expansion and contraction of rocks.
• Exfoliation, block disintegration, granular disintegration etc., are the different types of weathering.

Chemical weathering

• Disintegration and decomposition of rocks due to chemical reactions is called chemical weathering.
• This is predominantly high in the hot and humid regions such as the equatorial, tropical and sub tropical zones.
• Chemical weathering takes place through the processes of oxidation, carbonation, solution and hydration

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