1. What is an earthquake? LO: I can use geographical terminology associated with tectonic processes

2. Working in pairs answer the following questions: What are earthquakes? What do you understand by the words magnitude, epicentre and focus?

3. Key terms: Earthquake: Shaking and vibration of the ground caused by movements in the earths crust. Magnitude: The strength of an earthquake Epicentre: The point on the ground above the focus where the vibration is the greatest Focus: The point underground that shock waves travel out from

4. Epicentre and focus

6. How do we measure earthquakes? LO: to understand the difference between the Richter scale and the Mercalli scale

7. What is the difference between the Richter scale and Mercalli scale? The Richter scale: Measures the intensity fo the earthquake The Mercalli scale: measures the damage caused by the earthquake

8. The Richter scale

9. The Richter scale can be used to measure the magnitude (power) of a tremor using an instrument called a seismograph. How are earthquakes measured? It is a logarithmic scale which means that a size ‘6’ earthquake on the Richter scale is 10 times larger than a size ‘5’ and 100 times larger than a size ‘4’.

10. How does a seismograph work?

12. Richer scale task: Play the game… Guess the Richter scaleRichter scale

13. The Mercalli scale rates an earthquake's magnitude based on observations of the damage it causes on a scale of 1 to 12. The Mercalli Scale Items shake from shelves: scale 5 Buildings collapse: scale 10

14. The Mercalli scale Use the descriptions on to produce a series of cartoons that show each of the categories of the Modified Mercalli Scale

16. Mercalli scale task: Use the descriptions of the points on the Mercalli scale to draw pictures or cartoons, or find photos on the internet to show the destruction observed at each point on the scale.