earthquakes

Question 1

earthquake definition

Answer 1

An earthquake is a sudden shaking of the ground.It can be the result of movement within the Earth’s crust or volcanic action.

Question 2

epicentre definition

Answer 2

Directly above the focus on the Earth’s crust.

Question 3

plate movement definition

Answer 3

The direction the plates move.

Question 4

focus definition

Answer 4

Where the pressure is released in the crust.

Question 5

seismic waves definition

Answer 5

Waves of energy that travel through the Earth’s layers.

Question 6

at which plate boundary are earthquakes weaker and why?

Answer 6

Earthquakes are weaker at conservative plate boundaries as they don’t have a focus where friction occurs.Therefore, they don’t snap apart and is less effective.

Question 7

The closer the focus is to the surface, the more effective the earthquake.

Answer 7

The closer the focus is to the surface, the more effective the earthquake.

Question 8

what are the 4 s’?

Answer 8

slide
stick
snap
seismic waves

Question 9

stages of the 4 s’ at a destructive plate boundary?

Answer 9

1.The oceanic plate subducts under the continental plate because it is denser.
2.Friction causes them to stick together.
3.Once pressure has built up they snap apart.
4.This releases seismic waves outwards causing an earthquake.

Question 10

stages of the 4 s’ at a collision plate boundary?

Answer 10

1.Two continental plates move towards each other and move upwards.
2.Friction causes them to stick together.
3.Once pressure has built up they snap apart.
4.This releases seismic waves outwards causing an earthquake.