Processes of Mountain Building
Fold mountains are formed when two plates collide and their edges fold. Just imagine the folds a piece of paper makes when both sides are pushed together. These are the most common types of mountains and holds the world's longest mountain range. Some examples of fold mountains are the Himalayan Mountains that are located in Asia or the Rocky Mountains in North America.
Fault-block mountains are formed when cracks in the Earth's crust forces some materials and rock up and down and they end up piling on top of each other. These mountains often have a steep front side while their back side is more sloping. Some examples of these mountains are the Sierra Nevada Mountains which are located in North America and the Harz Mountains located in Germany.
Volcanic Mountains are formed when magma in the Earth erupts and piles upon the surface. The magma builds up over time to make layers upon layers, forming a mountain. Some examples of these mountains are Mount St. Helens which is located in North America and Mount Pinatubo located in the Philippines.