Here's why:
* Different Origins: Mountains and volcanoes form through different processes. Mountains are typically formed by the collision of tectonic plates, pushing land upwards. Volcanoes are formed by the eruption of magma from the Earth's mantle.
* Volcanoes Can Exist on Mountains: It's possible for a volcano to exist on a mountain, but the mountain was formed independently.
* Volcanic Activity Requires Specific Conditions: For a volcano to form, there needs to be a source of magma, a pathway for the magma to travel to the surface, and a location where the magma can erupt. These conditions aren't necessarily present in all mountain ranges.
Think of it like this: Imagine a pile of dirt (the mountain) and a pressure cooker (the volcano). The pressure cooker can be placed on top of the pile of dirt, but the dirt itself doesn't transform into the pressure cooker.