A mountain is a large landform that stretches above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill . Mountains are formed through tectonic forces or volcanism . These forces can locally raise the surface of the earth. Mountains erode slowly through the action of rivers , weather conditions , and glaciers . A few mountains are isolated summits , but most occur in huge mountain ranges . High elevations on mountains produce colder climates than at sea level . These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals . Because of the less hospitable terrain and climate, mountains tend to be used less for agriculture and more for resource extraction and recreation, such as mountain climbing . The highest mountain on Earth is Mount Everest in the Himalayas of Asia , whose summit is 8,850 m (29,035 ft) above mean sea level . The highest...
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