Final answer:
Physical weathering is the disintegration of rock without changing its chemical composition. Water seeping into a crack where it freezes and expands is an example of physical weathering.
Explanation:
Physical weathering refers to the breakdown of large pieces of earth material into smaller ones without changing their chemical composition. An example of physical weathering is water seeping into a crack where it freezes and expands, causing the rock to crack. This process, known as frost wedging, is a common form of physical weathering.
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