Describe the landforms formed by a river in the plains.

1. Exogenic forces:

(i) Exogenic forces are the external forces on the surface of the earth. Weathering and erosion are two ways in which exogenic forces act.

(ii) Erosion is usually the result of weathering.

(iii) Thus, the agents of erosion and deposition generate various landforms.

2. Work of A River:

(i) A river is formed when several tiny streams join together. The river basin is the region drained by the river and its tributaries.

(ii) A waterfall is generated when river water falls almost vertically down a steep valley slope.

(iii) A rapid is a steeply sloped section of a swiftly moving river.

(iv) The river bends and turns, creating huge bends or loops. These are known as meanders.

(v) The circular loop that remains after being cut off from the main canal generates an ox-bow lake.

(vi) The river's rich alluvial material is deposited on the valley floor.

(vii) Long hills of low height, grow along the banks of this fruitful area, which is known as the flood plain. These are known as natural levees.

(viii) Due to sediment deposition, triangular-shaped land forms between the distributaries. This is known as a delta.

3. Work of Sea Waves:

(i) Through sea waves, seawater, Currents, tides, and storms conducts erosional and depositional action.

(ii) Cracks create with the continual impact of sea waves, and eventually widen and form huge caverns, which grow into sea caves.

(iii) Other landforms generated by sea waves include sea arches, stacks, sea cliffs, beaches, sandbars, and lagoons.

4. Work of Moving Ice:

(i) A glacier is a river of snow and ice that travels very slowly.

(ii) Glaciers emerge from the snowfields.

(iii) A glacier's work, involves erosion, movement, and deposition.

(iv) The rocks serve as erosional tools. As a result, rock materials with ice are deposited on the valley's walls and floor.

5. Work of Wind:

(i) Wind is the most powerful erosive force in deserts.

(ii) A powerful wind brings a lot of sand, dust particles, and gravel with it.

(iii) These loose debris aid in the erosion of the rocks.

(iv) The wind's work is restricted to a few metres above the earth.

(v) The winds erode lower part of the rocks more than upper part and form Mushroom rocks.

(vi) Sand dunes is a hillock of sand and tend to move slowly in the direction of the wind.