1. Weathering: This is the process of breaking down rocks due to exposure to the elements.

* Physical weathering involves mechanical forces like freezing/thawing, abrasion (rocks rubbing against each other), and plant roots growing.

* Chemical weathering involves chemical reactions, like acid rain dissolving certain minerals in rocks.

2. Erosion: This is the movement of rock fragments by wind, water, or ice.

* Wind erosion: Strong winds can pick up small rock fragments and carry them away, creating sand dunes and other landforms.

* Water erosion: Rivers, streams, and ocean waves can break down rocks and carry the fragments away. This can carve out canyons and create beaches.

Let me know if you'd like more detail on any of these processes!