2. EROSION FOLDABLE

3. EROSION IS
Process that moves weathered sediments from one location to another
Sediments are either weathered chemically or mechanically
The four agents of erosion are:
Wind
Water
Gravity
Glacier

4. COMMON CHARAC TERISTICS
Carry sediments when they have energy of motion
Drop their load of sediments when energy of motion decreases
Deposition is the dropping of sediments

5. GRAVITY Mass movement is when materials move down slope
Can be very fast or very slow

6. SLUMP
Slump takes place on steep slopes when material slips downward as one large mass leaving a curved scar
Occurs when the material under weakens

7. CREEP Very slow movement
Common in areas of freezing and thawing since as the ground freezes, small sediments are pushed upwards
Usually seen with fences and utility poles

9. ROCKSLIDE
Happens when large blocks break loose from steep slopes and tumble quickly to the bottom

10. MUDFLOWS/MUDSLIDES
Usually occur in relatively dry areas where weathering had formed thick layers of sediments
With a heavy rain the water adds mass and makes the sediments slippery
Occurs on steep slopes
mudslide

11. WATER Erodes more sediments than any other agent
The more energy of movement the more is eroded
When the water loses energy the sediments are dropped
Alluvial fan is shaped like a triangle and is deposited in rivers
Delta is deposited when it empties into an ocean, gulf or lake

12. WATER DEPOSITION ALLUVIAL FAN

13. DELTA

14. RILL AND GULLY EROSION
Begins when a small stream forms during a heavy rain.
Carries away plants and soil
If it happens frequently it will evolve into a gully
Gully erosion, the channel is deeper and broader

15. RILL EROSION

16. GULLY EROSION

17. SHEET EROSION
Happens when rainwater flows over a fairly flat area or gentle slope
When the water loses its energy of motion, the sediments cover the land like a sheet

18. LAND PRONE TO EROSION

19. STEEP SLOPES
When you build you destroy the vegetation which helps to keep soil in place
Not much to anchor your house to

20. SOLUTIONS

21. TERRACES

22. GLACIERS
It is a moving mass of ice and snow
Two types are continental and valley
Continental cover about 10% of the surface and are found at polar regions
Valley glaciers are located in mountainous regions
Move slowly and act as a bulldozer
Plucking is when they pick up rocks and scrape the surface of what they move over

23. CONTINENTAL

24. VALLEY

25. U-SHAPED VALLEY

27. GLACIAL GROOVES

28. TILL
Deposited when it loses energy of motion

29. MORAINE

30. OUTWASH

31. WIND
*common in deserts, beaches and plowed fields *deflation when wind picks up fine sand and leaves behind pebbles

32. ABRASION is similar to sandblasting

33. LOESS IS A LARGE DEPOSIT OF FINE SAND
DUNES ARE THE MOST COMMON
FORMED WHEN SAND PILES UP DUE TO AN OBSTACLE
CONSTANTLY CHANGING