Chapter 7

Question 1

Landslides

Answer 1

Are caused by wearing away of material at the base, coastal erosion and earthquakes. It is the rapid movement of soil and rocks down a slope. Heavy rains can also loosen the soil. They can cause great harm by burying houses, churches and schools. People can be killed and roads can be blocked off so its difficult to help.

Question 2

Soil creep

Answer 2

Is the 1cm year movement of soil a year. Water and gravity cause the soil to move. Trees and fences bend downhill. Teracettes (natural steps) are formed on the slope. Walls collapse because of pressure building up behind them. It is faster at the surface and slower deep down.

Question 3

Mass movement

Answer 3

Is the movement of loose earth and stone called regolith down a slope due to gravity.

Question 4

Coastal cliff collapse

Answer 4

Occurs when the sea undercuts the cliff and the top falls down

Question 5

Bogbursts

Answer 5

Occur when bogs are liquified and flow down a hill or slope.

Question 6

Mudflows

Answer 6

Are fast movements of mud down a slope. These occur from heavy rainfall and volcanic activity. Lava melts snow which mixes with mud and forms a lahar.