1. TYPES OF EROSION
© Copyright   M. J. Krech. All rights reserved.

2. WHAT IS
EROSION?

3. Erosion is the movement of weathered rocks
and soil particles from one place to another.

4. THERE ARE FIVE AGENTS OF EROSION.
GRAVITY
GLACIERS
WIND
WATER
WAVES

5. GRAVITY
EROSION CAUSED BY GRAVITY IS CALLED
MASS WASTING.

6. RAPID MASS WASTING LANDSLIDE One type of rapid mass wasting is
which is the tumbling of dry soil and rocks downhill

7. RAPID MASS WASTING MUDFLOW Another type is
where rain mixes with the soil to form mud which moves downhill

8. RAPID MASS WASTING SLUMP Another type is where a huge block of rock
slides rapidly
down a hillside.

9. SLOW MASS WASTING One type of slow mass wasting is EARTHFLOW
where a mass of soil and plant life begin to slowly move downhill after a heavy rain.

10. SLOW MASS WASTING Another type is CREEP
where soil particles move slowly downhill.
This is the slowest.

11. GLACIERS A
GLACIER
is a large mass of moving ice and snow.

12. GLACIERS PLUCKING Glaciers move rocks by
where ice freezes around a rock and moves it along as the glacier moves.

13. GLACIERS Glaciers also move rocks by ABRASION
where rocks are loosened and moved by the glacier, causing scratches on the bedrock.

14. WIND Wind moves soil by DEFLATION
where wind removes loose material from the land.
Here smaller sand grains are blown
away from around larger rocks.

15. WATER Running water is the major cause of erosion.
Water picks up and carries loose particles of soil as it moves downhill.

16. WATER
Water starts out
in tiny grooves
called
RILLS

17. WATER
Rills become wider and deeper,
called
GULLIES

18. WATER
Gullies turn into
STREAMS
which turn into
RIVERS.

19. WAVES
Waves carry off small rocks and sand from the beach.

20. EROSION A.
What is the agent of erosion in this picture?

21. EROSION B.
What is the agent of erosion in this picture?

22. EROSION C.
What is the agent of erosion in this picture?

23. EROSION D.
What is the agent of erosion in this picture?

24. EROSION E.
What is the agent of erosion in this picture?

25. THE END F. BONUS: List at least three types of erosion in this picture
and how you
know.
© Copyright   M. J. Krech. All rights reserved.