- Temperature changes: When rocks are exposed to extreme temperature changes, they can expand and contract, causing them to crack and break down. This process is known as thermal expansion and contraction.

- Water: Water can cause mechanical weathering in several ways. For example, when water freezes, it expands and can crack rocks. Water can also dissolve minerals in rocks, weakening them and making them more susceptible to weathering.

- Ice: Ice can cause mechanical weathering by freezing and expanding in cracks in rocks. This process, known as frost wedging, can break rocks apart.

- Plants and animals: The roots of plants can grow into cracks in rocks and pry them apart. Animals can also cause mechanical weathering by burrowing and digging, which can loosen rocks and soil.

- Wind: Wind can carry sand and dust particles that can abrade rocks, wearing them down over time.