It is a form of weathering known as frost wedging.
Physical
It is a form of weathering known as frost wedging.
It is called "frost weathering" or "freeze-thaw weathering" and occurs because water that freezes within the cracks in rocks will expand, compressing and eventually fracturing the rock.
No. Chemical weathering is to do with acidic rain. This is a type of physical weathering, where it isn't the rainwater's ph, but the fact it freezes in cracks, expands, and prises the rock apart(creating a broken skyline or a scree slope). It occurs in damp areas where water is sometimes, not always below freezing.
Frostwegging
No, it is physical weathering. Ice wedging occurs when water seeps into cracks in rocks and freezes. Water expands when it freezes, and when that happens it can crack the rock, causing the rock to break down over time. No chemical changes occur during this process. The water stays water, it just changes state, and the rock stays rock, it just breaks down into smaller pieces.
It cracks the rock
Rain and wind are the physical causes of weathering.
water freezes in a crack in a rock
Physical (mechanical) weathering occurs when a rock is broken into smaller pieces without a change in chemical structure. Abrasion, fracture by freezing, plant root growth expansion of fractures, rock falls; these are forms of physical weathering.
Weathering changes Earth's surface by carrying sediments or creating sediment in many ways. A few are when animals burrow in the ground, they can sometimes break rock. Also, the cracks in the ground, which are formed from tree roots, are filled with water, and freezes, then melts, weathering occurs. Also, when waves in the ocean or lakes, ponds, etc., crash down on rock, weathing happens.
Physical weathering