What causes mountains to form?

Mountains form through tectonic processes, such as the collision, folding, or uplifting of Earth’s crust. When two tectonic plates converge, the crust is forced upward, creating fold mountains like the Himalayas. Volcanic mountains form when magma erupts and solidifies, as seen with Mount Fuji. Over millions of years, these processes shape Earth’s surface, creating dramatic landscapes and influencing ecosystems.