Mountains are formed by tectonic forces, not weathering. Weathering is the process that breaks down rocks, soil, and minerals, while tectonic forces are the forces that create mountains. Here's how it works:

* Plate Tectonics: The Earth's surface is made up of large pieces of rock called tectonic plates. These plates are constantly moving, and when they collide, they can buckle and fold, pushing the land upwards to form mountains.

* Types of Plate Collisions:

* Convergent Boundaries: When two plates collide, one plate is often forced under the other (subduction). This can cause the land above the subducting plate to buckle and rise, forming mountains.

* Continental Collisions: When two continents collide, they both push upwards, forming massive mountain ranges like the Himalayas.

* Weathering's Role: While weathering doesn't create mountains, it plays a significant role in shaping them. Weathering processes such as erosion, frost wedging, and chemical weathering wear down the mountains over time, creating valleys, canyons, and other distinctive features.

So, to summarize:

* Mountain formation: Tectonic forces (plate collisions)

* Mountain shaping: Weathering and erosion