Mass Movement

Question 1

What is Mass Movement?

Answer 1

Sliding, Slumping & Rock Falls

Question 2

What is the cause of Mass Movement?

Answer 2

Rainfall & Weathering

Question 3

Describe what happens in a rock fall?

Answer 3

Fragments of Rock breakaway from the cliff face due to weathering

Question 4

What processes have already weakened the rock in a Rock fall

Answer 4

Weathering - freeze then thaw

Question 5

What is the quickest form of Mass Movement?

Answer 5

Rock Fall

Question 6

What forms at the base of the cliff from the build up of rock falls

Answer 6

A Scree Slope

Question 7

Describe what happens in a Landslide?

Answer 7

1. Blocks of rock slide downhill
2. Blocks Maintain contact with the cliffside
3. The slide then collects as a pile of rocks on the beach/sea

Question 8

Where is a landslide more likely to occur?

Answer 8

1. Somewhere that is steep
2. A greater distance for sediment
   to move
3. less plants to stabilize the
   sediment

Question 9

Describe what happens in a mud slide

Answer 9

Soil that is filled with water (saturated) flows down a slope carrying rocks and debris

Question 10

When is a mudslide likely to occur?

Answer 10

1. After a period of heavy Rain
2. Where slopes are very steep
3. It is very fast

Question 11

Describe what happens in slumping

Answer 11

Saturated soil slumps down a curved surface

Question 12

When does Rotational Slumping Occur?

Answer 12

1. On a curved slip plain
2. When the soil is saturated
3. Where a layer of permeable
   (allows liquid through) rock sits
   on impermeable rock

Question 13

Do the self assessment Questions on the power point