Landforms and their Evolution — Chapter Summary

A landform is a small

A landform is a small to medium tract of the earth's surface. A landscape is a large tract made up of several related landforms. Each landform has a d

Landforms once formed may change slowly

Landforms once formed may change slowly or fast because erosion and deposition continue. Changes in climate and movements of landmasses can also alter

Running water works in two forms

Running water works in two forms: overland flow as sheet flow and linear flow as streams and rivers in valleys. It is especially important in humid re

Youth stage has few streams

Youth stage has few streams, poor integration, shallow V-shaped valleys and broad flat divides. Mature stage has many streams, deep V-shaped valleys a

Valleys begin as rills

Valleys begin as rills, deepen into gullies and then become valleys. A gorge is a deep valley with very steep to straight sides and almost equal width