basics

Question 1

Define natural hazard

Answer 1

A naturally occurring process which as the potential to cause loss of life or damage to property.

Question 2

Define natural disaster

Answer 2

A major hazard that causes widespread disruption to a community/region that the affected community is unable to deal with adequately without outside help.

Question 3

How do the plates move?

Answer 3

1) Core of earth is very hot
2) Heat transfer outwards; to colder surface of the Earth
CONVECTION CURRENT
3) Drag plates to move in different directions

Question 4

Crust, Mantle and Core composition?

Answer 4

Crust – silica, aluminium, magnesium
Mantle – magnesium, iron
Core – iron, nickel

Question 5

Crust + uppermost part of mantle =

Answer 5

Lithosphere (solid)

Question 6

Upper part of mantle =

Answer 6

Asthenosphere (liquid)

Question 7

What are the states of the 3 composition of Earth?

Answer 7

Crust: solid
Mantle: semi-molten
Outer core: liquid
Inner core: molten

Question 8

3 composition of Earth’s depth, and material:

Answer 8

Crust: 60-70km, rigid rocks
Mantle: 2900 km, hot molten rocks of magma
Core: 3470 km, heavy metal