Mass movement

Question 1

Landslip

Answer 1

(action of water and gravity)
Rainfall weakens soil/sand
Weight added loosens rocks
Gravity causes fall

Question 2

Rockfall

Answer 2

(action of gravity)
Fall of rocks
Worsened by freeze-thaw weathering (potential for action of temp. change)

Question 3

Mudflow

Answer 3

(action of water and gravity)
After periods of rain
Mud flows down a slope any higher than 10 degrees
Sudden addition of water to dry soil -loosens soil

Question 4

Soil creep

Answer 4

(action of water and heat)

Soil moves laterally due to expansion and contraction during periods of wet and dry