Earthquakes

Where do earthquakes occur?

At passive and destructive plate boundaries.

How do earthquakes occur?

Two plates try to slide past or collide with each other. Then the plates lock and the energy is released causing earthquakes

Name the instruments used to measure earthquakes.

Seismograph, Moment magnitude scale, Richter scale, Mercalli scale

What do seismographs measure?

seismic waves

What does a Richter scale measure?

The strength of an earthquake.

What does the moment magnitude scale measure?

the amount of energy released by an earthquake.

What does the Mercalli scale measure?

damage caused by the earthquake

How can humans reduce the impact of an earthquake?

We can reduce the damage by building earthquake resistent buildings, early-warning systems and drills.

Label the diagram.

a) Tremors

b) Epicentre

c) Fault lines

d) Focus