Earthquakes

http://video.nationalgeographic.com/video/player/environment/environment-natural-disasters/earthquakes/earthquake-montage.html

Aims:

What is magnitude?

How are earthquakes measured?

The Richter Scale

The Mercalli Scale

http://elearning.niu.edu/simulations/Mercalli.html

The Richter Scale – Draw a picture to illustrate the Richter scale

1) Only animals feel the earth move 2) People in tall buildings feel slight movement

3) Pictures on walls move 4) Loose tiles fall from roofs

5) Windows break 6) Damage to buildings – Chimneys fall down

7) Poorly built buildings fall down 8) Well built buildings suffer damage

9) All buildings fall down, pipes are broken and fires break out

10) Total devastation