1. Erosion and Deposition
6th Grade Earth Science
October 2017

2. What is Erosion?
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Erosion is the movement of sediment by wind, ice, water, or gravity.

3. Write on the back of foldable
What is Deposition?
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The dropping of sediment out of the wind, water, ice, or gravity and settling in a new place.

4. Gravity Erosion
Sediment falls

5. Gravity Erosion
Angle of Repose is the steepest angle at which a sloping surface formed of a particular loose material is stable.

6. gravity moves material down a slope
Gravity Deposition
Mass Movement
gravity moves material down a slope
Landslide – the sudden movement of rock and soil down a slope
Creep – the slow downhill movement of weathered rock material
Slump –a block of material moves downslope

7. https://youtu.be/mknStAMia0Q
Gravity Deposition
Mudflow – the flow of a mass of mud or rock and soil mixed with a large amount of water
Avalanche – a mass of snow, ice, and rocks falling rapidly down a mountainside.

8. What type of mass movement is each picture?
LANDSLIDE
MUDFLOW 2 1
What type of mass movement is each picture?
CREEP
SLUMP 4 3

9. Ice (glaciers) move and carry sediment.
Ice Erosion
Ice (glaciers) move and carry sediment.

10. Ice Deposition
Moraine - Moraine is material transported by a glacier and then deposited. 

11. Ice Deposition
Kettle Lakes – Kettles are depressions left behind after partially-buried ice blocks melt. Many are filled with water, and are then called "kettle lakes".

12. Ice Deposition
Kettle Lakes –

13. Ice Deposition
Kettle Lakes –

14. Wind moves sediment after it is weathered.
Wind Erosion
Wind moves sediment after it is weathered.

15. Wind Deposition
Sand Dunes – mounds of wind deposited sand. Move in direction of wind.

16. Wind Deposition
Loess – very fertile sediments of Quartz, Felspar, Mica, and clay deposited by the wind

18. Water Erosion
Water (rivers, oceans, rain, etc.) washes sediment after being weathered

20. Water Deposition
Deltas – slow river current drops sediment in fan-shaped pattern at end of river
Sand Bars – offshore deposit of sand, gravel, or shell material
Alluvial Fans – fan-shaped mass of material deposited by a stream with a steep incline; created by run-off
Beaches – deposited sand

21. Delta

22. Sand Bar

23. Alluvial Fan

24. Beaches

26. What did water create in each of these pictures? 5 2 3 1 2
SANDBAR
DELTA
BEACH 1 4 4 6 4
ALLUVIAL FAN
What did water create in each of these pictures?

27. Erosion and Deposition Exit Ticket
List one agent / cause of Erosion and one way it changes the Earth.
List a second agent / cause of erosion and one way it changes the Earth.