River Valley Development and Landforms

The video explains the process of gradation, where rocks are broken down and transported by agents like rivers, glaciers, wind, and waves. It details how these agents, aided by gravity, erode and deposit sediments, forming various landforms. The video covers the upper, middle, and lower courses of rivers, describing landforms such as gorges, v-shaped valleys, waterfalls, floodplains, oxbow lakes, braided rivers, deltas, and estuaries. It also outlines the stages of river valley development: youthful, mature, and old stages.

Which of the following is NOT an agent of gradation?

• Waves

• Mountains

• Glaciers

• Rivers

What type of valley is formed in mountainous regions with hard rock and little rainfall?

• V-shaped valley

• U-shaped valley

• Gorge

• Floodplain

What is a series of rapids over a large river called?

• Waterfall

• Oxbow lake

• Cascade

• Cataract

In the middle course of a river, what landform is created when a river's speed decreases suddenly?

• Gorge

• Estuary

• Alluvial fan

• Delta

What is formed when a meandering river cuts across the narrow necks of land?

• Floodplain

• Canyon

• Oxbow lake

• Braided river

Which landform is characterized by a funnel-shaped wide bay at its mouth?

• Gorge

• Alluvial fan

• Estuary

• Delta

What is the main work of a river in its lower course?

• Transportation

• Erosion

• Deposition

• Formation of rapids

During which stage of river valley development are b-shaped valleys formed?

• Old stage

• Mature stage

• Youthful stage

• Middle stage

In which stage of river valley development is the widening work faster than the deepening work?

• Youthful stage

• Mature stage

• Old stage

• Initial stage

What type of valley is formed during the old stage of river valley development?

• B-shaped valley

• Delta

• V-shaped valley

• U-shaped valley