Here's the breakdown:
* Erosion: This is the process of wearing down and transporting rock and soil. It can shape mountains and create valleys, but it doesn't create mountains themselves.
* Deposition: This is the process of dropping off eroded material, creating features like sand dunes, deltas, and even some plateaus. However, it doesn't build mountains.
Mountains are primarily formed by tectonic plate movements:
* Collision zones: When tectonic plates collide, one plate can be pushed up over the other, forming mountain ranges like the Himalayas.
* Subduction zones: When one plate slides under another, the overriding plate can be uplifted and folded, creating mountains.
* Volcanoes: These are mountains formed by eruptions of lava and ash from the Earth's mantle.
Erosion and deposition can play a role in shaping mountains:
* Erosion: Glaciers, rivers, wind, and rainfall can carve out valleys and peaks, changing the shape of mountains.
* Deposition: Erosion can deposit material at the base of mountains, creating foothills and other landforms.
In summary, erosion and deposition are agents of change that shape mountains, but they don't create them. The primary force behind mountain formation is tectonic activity.
