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If your question was meant to say "what is a type of weathering that changes rocks" then I'll name you Two: one is called freeze thaw weathering, what happens is moisture and liquid water get into small irregularities in the rock and can freeze when the temperature gets cool enough, now when water freezes it expands by a scale of about 1.1X bigger (it gets bigger by 10%) which means if the water is in a small crack in the rock it will push outwards on the rock and crack it even more, this process will repeat and the rock will change in shape by cracking through and breaking. this weathering style also affects cliff faces etc.

The other type is called onion skin weathering i believe, basically the rock gets heated by the midday sun typically in a desert and heats up, it expands evenly as the heat is imparted over a long period, when night time comes around the temperature surrounding usually plummets and the surface of the rock cools down and shrinks, but the core is still hot meaning that the outer layers want to push back on the core which is too large (it cannot do this) so it cracks in order to fit around this still hot core of the rock, if you repeat this many times the rock will become defaced and cracked all over, eventually breaking down into gravel type rock.

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12y ago
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13y ago

It is a physical change

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11y ago

Its Called SHUT UP aND sTUDY

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13y ago

both physical and chemical

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Q: What type of change is weathering?
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