Question

The river works as an agent of gradation.’ Explain the work of a river in this context

Answer 1

$\huge\underline\bold\blue{Answer}$

The running water in the river erodes the landscape. 

The running water in the river erodes the landscape. When the river tumbles at a steep angle over very hard rocks or down a deep valley side it forms a waterfall.

The running water in the river erodes the landscape. When the river tumbles at a steep angle over very hard rocks or down a deep valley side it forms a waterfall.While entering the plain the river twists and turns and forms large bends which are known as meanders. Due to continuous erosion and deposition along the sides of the meander, the ends of the meanders loop come closer and closer. In-due course of time the meander loop cuts off from the river and forms cut-off lake, which is also called an ox-blow lake.

The running water in the river erodes the landscape. When the river tumbles at a steep angle over very hard rocks or down a deep valley side it forms a waterfall.While entering the plain the river twists and turns and forms large bends which are known as meanders. Due to continuous erosion and deposition along the sides of the meander, the ends of the meanders loop come closer and closer. In-due course of time the meander loop cuts off from the river and forms cut-off lake, which is also called an ox-blow lake.Sometimes, the river overflows its banks causing flood in the neighboring areas. As it floods, it deposits layers of the fine soil and other material called sediments along its banks. As a result fertile floodplain is formed. The raised banks are called levees.

The running water in the river erodes the landscape. When the river tumbles at a steep angle over very hard rocks or down a deep valley side it forms a waterfall.While entering the plain the river twists and turns and forms large bends which are known as meanders. Due to continuous erosion and deposition along the sides of the meander, the ends of the meanders loop come closer and closer. In-due course of time the meander loop cuts off from the river and forms cut-off lake, which is also called an ox-blow lake.Sometimes, the river overflows its banks causing flood in the neighboring areas. As it floods, it deposits layers of the fine soil and other material called sediments along its banks. As a result fertile floodplain is formed. The raised banks are called levees.As the river approaches the sea, the speed of the flowing water decreases and the river begins to break up into several streams known as distributaries. Then a time comes when the river becomes very slow and it begins to deposit its load. Each distributary forms its own mouth. The collection of sediments from all the mouths forms a delta, which is a triangular landmass.

Answer 2

Answer:

The breaking down, transportation and deposition of rock minerals leading to the levelling of the Earth's surface is known as gradation.

1. The two forces that bring about gradation are as follows:

Internal forces: These are the forces that act from within the Earth's surface. For example, volcanos and earthquakes

2. External forces: Such forces act over the Earth's surface. For example, winds and waves