Mountain classification is a system used to categorize mountains based on their characteristics, such as height, formation, and location. The most common classifications include fold mountains, fault-block mountains, volcanic mountains, and plateau mountains. Each type is formed through different geological processes, which influence their shape and structure. Mountains are also classified by height. For example, hills are generally lower than 1,000 feet, while mountains are typically over 1,000 feet. The highest mountains, like those in the Himalayas, can exceed 29,000 feet. This classification helps scientists and geographers understand the Earth's topography and geological history.