Homework

• NOW:

• Hand in your journey to the centre of the earth poster / model.

• THIS WEEK:

• Finish off your documentary script.

LO: What are earthquakes and how are they measured?

How many earthquakes do you think have occurred in the last 24 hours across the

world?

• Find out here

LO: What are earthquakes and how are they measured?

What are earthquakes and how are

they measured?Video here

LO: What are earthquakes and how are they measured?

Epicentre and focusDraw a diagram to locate the focus and epicentre

LO: What are earthquakes and how are they measured?

Focus

Epicentre

Epicentre and focus

LO: What are earthquakes and how are they measured?

Watch the first 30 seconds of this news report

If the epicentre of an earthquake is at ‘A’, which settlement will be damaged the

most? Give reasons for your answer.

LO: What are earthquakes and how are they measured?

What are earthquakes and where do they occur?

They can occur at all the major plate boundaries but the most severe earthquakes are normally found at CONSERVATIVE and DESTRUCTIVEboundaries.CONSERVATIVE

DESTRUCTIVE

LO: What are earthquakes and how are they measured?

Card Sort

• In pairs, read the information on the cards

• Work out the correct sequence to explain what causes an earthquake.

• What did you decide?

LO: What are earthquakes and how are they measured?

Your Turn!

In your own words try to explain to your neighbour how an earthquake happens –use the correctly ordered cards to help you.

LO: What are earthquakes and how are they measured?

Your Turn! _____________ are caused when two _________ moving past each other become ‘stuck’ for a while, so ______ builds up. Eventually the stress becomes so great that the ______ breaks and moves suddenly. The point where the ______ actually breaks is called the _______ , which is __________________. The point on the surface directly above the focus is called the ________ . When plates move suddenly ________ waves are sent out which can cause a lot of _________.

epicentre tension focus shock plates underground crust

damage Earthquakes rock

LO: What are earthquakes and how are they measured?

How are earthquakes measured?Watch this

LO: What are earthquakes and how are they measured?

LO: What are earthquakes and how are they measured?

LO: What are earthquakes and how are they measured?

How can we measure earthquakes?

• Earthquakes are measured using the Richter Scale. This measures the magnitude of a tremor (how powerful it is) using an instrument called aseismograph.

• Although the Richter Scale has no upper limit, the largest known shocks have had magnitudes in the 8.8 to 8.9 range. It is a logarithmic scale which means that a size ‘6’ on the Richter Scale is 10 times larger than a size ’5’ and 100 times larger than a size ‘4’.

LO: What are earthquakes and how are they measured?

A seismograph

LO: What are earthquakes and how are they measured?

Ipad app time – Seismograph

TASK • Complete the statement at the top of the

sheet.

• Draw illustrations to show how the strength of the Richter scale increases.

• Each box has a description about the amount of damage you would expect to find.

LO: What are earthquakes and how are they measured?

Where on the Richter scale do you think these are?

LO: What are earthquakes and how are they measured?

Task

• On your own write a script for a TV documentary exploring the ideas from today’s lesson. Remember to include - how earthquakes happen - how earthquakes are measured

L.O: What causes earthquakes and how are they measured?

Homework

• Complete your script for a documentary

• We will listen to them at the start of next lesson!

LO: What are earthquakes and how are they measured?

Give me 5!

Give me 5 new ideas that you have learned from today’s

lesson.

LO: What are earthquakes and how are they measured?