mechanical
Physical
Freezing is a physical process.
Weathering, specifically freeze-thaw weathering. If rain gets into the crack and freezes, it expands and pushes the crack wider.
This process could either be called Freezing/Thawing or Ice Wedging. Ice Wedging splits the rock when water seeps into cracks then freezes and expands.
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.
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.
wedginald
It is a form of weathering known as frost wedging.
If water freezes in the crack and expands, that would be physical weathering.
Ice wedging is physical weathering. As water freezes it grows, so when water flows into cracks or holes and then freezes it causes the water to expand, which brakes apart whatever it seeped into.
Physical
It is a form of weathering known as frost wedging.
It is simply called freeze-thaw weathering.
When ice forms in cracks in rocks, the kind of weathering is known as mechanical weathering. The type of mechanical weathering that freezes and thaws is frost wedging.
Freezing is a physical process.
It falls in the cracks as water and freezes. As it freezes, it expands, eroding what ever it fell into, whether its concrete or rock.
water freezes in a crack in a rock