The three kind of landforms found on Earth are mountains, plains and plateaus. Mountains are natural topographical features that may reach great heights, while plains and plateaus are lower, longer and flat.
Mountains may rise far above the surface of the Earth, and generally have narrow tops, or summits, and long steep sides. Their summits and slopes are characterized by uneven terrain and are geologically diverse: Fissures, caves, and open, vulnerable surface faces are common characteristics. They form in several ways including through volcanic activity. Plains, in contrast, are flat areas that do not rise far above sea level. They are found along coasts and further inland too. Lastly, plateaus are broad and flat land areas that are taller than plains, and may be intersected by geological features such as rivers and streams.