1. Erosion and Deposition
6th Grade Earth Science
October 2016

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

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

4. Gravity Erosion
Sediment falls

5. Angle of Repose is the steepest angle a material will not slide down.
Gravity Erosion
Angle of Repose is the steepest angle a material will not slide down.

6. gravity moves material down a slope
Gravity Deposition
Mass Movement
gravity moves material down a slope
Landslide - rock & soil move quickly
Creep – slow landslide
Slump – block of land slides downhill
Mudflow – mud
Avalanche – snow

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) carry sediment.
Ice Erosion
Ice (glaciers) carry sediment.

10. Ice Deposition
Tills – unsorted, deposited rock material

11. Ice Deposition
Stratified Drift – layers of rock deposited based on size

13. Wind blows sediment after it is weathered.
Wind Erosion
Wind blows sediment after it is weathered.

14. Wind Deposition
Sand Dunes – mounds of wind-deposited sand. Moves in the direction of the wind.

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

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

19. 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
Beaches – deposited sand

24. 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?

25. 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.