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Examples of physical weathering include:
1. **Wind blowing sand to grind against rocks**:
- When wind carries sand and it rubs against rocks, it acts like sandpaper, gradually wearing down the surface of the rocks. This process is known as abrasion and is a common form of physical weathering.
2. **Water getting into the cracks of rocks, freezing, and expanding to break rocks**:
- Water seeping into the cracks of rocks can freeze during cold temperatures. As water freezes, it expands, exerting pressure on the surrounding rock. Over time, this repeated freezing and thawing can cause the rock to break apart, a process called frost wedging.
3. **Plants growing into rocks and expanding, breaking the rock**:
- Plants can grow in crevices or cracks within rocks. As the roots of the plants expand, they exert pressure on the rock, causing it to crack and break apart. This type of physical weathering caused by plant growth is known as biological weathering.
These examples illustrate different mechanisms through which physical weathering can occur, leading to the breakdown of rocks and landforms over time.
