1. AIM: What is Mass Movement?
Do Now: What factors do you think cause the land to move suddenly or fall apart on the surface of the Earth (cause a mass movement).

2. *Mass Movements shape the landscapes on Earth
Mass Movement- the transfer of rock and soil down slope due to gravity
*Mass Movements shape the landscapes on Earth

3. Triggers (causes) of Mass Movement
A) Water
Makes the soil/rock loose
(over saturated)

4. B) Oversteepend slopes
Material falls off steep slopes (people make the land too steep)
C) Earth Quakes
dislodges or move large amounts of rock

5. D) Removal of Vegetation
roots hold together the soil.

6. II. Types of Mass Movement
Classified by their speed and type of material that is moving
A. Rockfalls
rock fragments move through the air
Rock fall car
B) Slides
movement of rock/material in contact with the surface.
Landslides
Japan landslide

7. C) Slumps
slow downward movement of material causing a curved appearance.

8. D) Mudflow E) Earthflows Move quickly
Occurs after/during heavy rains or rapid snow melt
E) Earthflows
Move slowly
Occurs on hillsides in wet regions

9. III. Preventing Mass Movement
What do people do to prevent damage from mass movements?
construct fences
build walls
put up signs
Rock fall fence (high energy)

10. Closure:
- Take a “Types of Mass Movement” worksheet from the back top bin. You have 10 minutes to complete both side and then we will go over the worksheet.