Hill

A hill is a natural rise in the land that stands above the surrounding area and is generally lower and less extensive than a mountain. There is no single worldwide height that separates the two: the distinction can depend on local geography and usage. Hills may have rounded, smooth, or uneven slopes, with either gradual or steeper sides. They can form in several ways.

Uplift and erosion may leave resistant rocks standing above softer rocks, while sediments can accumulate and later be shaped by erosion. In some regions, volcanic activity has also produced hills or small volcanic cones. A hill may stand alone, occur in a group, or form part of a wider landscape such as a valley or plateau. Hills continue to change under natural processes.

Rainwater can carry soil down slopes, streams can cut small channels, and weathering gradually breaks rocks into smaller pieces. Vegetation often helps hold soil in place through its roots, although plant cover varies with climate, altitude, and ground conditions. People have long used hills for farming, grazing, settlements, roads, and communication sites.

In some areas, terraces show how slopes were adapted for cultivation. Because hills differ in origin, rock type, climate, and vegetation, they do not all have the same shape or ecological role. A hill is therefore not simply a small mountain, but a broad category of elevated land shaped by geological processes and its environment.