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Lesson 3 – page 3.  To learn what is erosion:  Abrasion  Hydraulic action  Attrition  Solution  To learn what is transportation:  Traction  Saltation.

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Presentation on theme: "Lesson 3 – page 3.  To learn what is erosion:  Abrasion  Hydraulic action  Attrition  Solution  To learn what is transportation:  Traction  Saltation."— Presentation transcript:

1 Lesson 3 – page 3

2  To learn what is erosion:  Abrasion  Hydraulic action  Attrition  Solution  To learn what is transportation:  Traction  Saltation  Suspension  Solution  To learn what is deposition.  Key Skill = Communication

3  Erosion is the wearing away of land and then the transportation of the worn away material.

4  Abrasion: When material carried by the river rubs against its banks and bed.  Attrition: Rocks transported by the river collide, break up into smaller pieces and become smoother and more rounded.  Hydraulic action: The force of moving water.  Solution: When chemicals in water dissolves the rock.

5  What is erosion?  What are the 4 processes that make up river erosion?

6  Is the movement of the material that has been eroded. This material is called the load.

7  Bedload (along the streambed – sometimes called traction)  Saltation (by a series of hopping movements along the bed)  Suspended load (above the bed)  Solution (dissolved in the water).

8  What is transportation?  What are the 4 processes that make up river transportation?

9  As the river loses energy it can no longer carry its load. The load settles to the river bed. The larger load settles first.

10  Explain why deposition happens in rivers.

11  Try to devise a sketch or sketches to help illustrate the processes of erosion and transportation.


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