Question

1. What types of erosion can affect a river valley? Tell each one does?
2. Describe an erosional change that occurs rapidly. Describe an emotional change that occurs slowly.​

Answer 1

Answer:

1) When pebbles grind along the river bank and bed in a sand-papering effect. Attrition - When rocks that the river is carrying knock against each other. They break apart to become smaller and more rounded. Solution - When the water dissolves certain types of rocks, eg limestone.

2)Depending on the type of force, erosion can happen quickly or take thousands of years. The three main forces that cause erosion are water, wind, and ice. Water is the main cause of erosion on Earth.

Answer 2

Ans:- 1.The four main types of river erosion are abrasion, attrition, hydraulic action and solution. Abrasion is the process of sediments wearing down the bedrock and the banks.

2.The surface of the earth changes. Some changes are due to slow processes, such as erosion and weathering, and some changes are due to rapid processes, such as landslides, volcanic eruptions, and earthquakes.