Answer:

1.) Chemical reactions break down the bonds holding the rocks together, causing them to fall apart into smaller and smaller pieces. Weathering causes erosion, the process of these rock particles being carried away and deposited in other level places.

2.) Mechanical weathering (also called physical weathering) breaks rock into smaller pieces. These smaller pieces are just like the bigger rock, just smaller. That means the rock has changed physically without changing its composition.

2 Mechanical weathering breaks rocks into smaller pieces without changing their composition.

1 Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface.