- Cycles of freezing and thawing water cause ice wedging
- Ice wedging is a kind of mechanical weathering
- So, cycles of freezing and thawing water cause mechanical weathering

- Cycles of freezing and thawing water cause mechanical weathering
- Mechanical weathering means breaking down rocks from a larger whole into smaller pieces by mechanical means
- So, cycles of freezing and thawing water will break down rocks from larger whole into smaller pieces

Hence, cycles of freezing and thawing water will break down rocks from larger whole into smaller pieces
The freezing and thawing action of water affects a rock by
- Mechanical weathering means breaking down rocks from a larger whole into smaller pieces by mechanical means 
- Cycles of freezing and thawing water cause ice wedging 
- Ice wedging is a kind of mechanical weathering