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Why do earthquakes happen?

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Presentation on theme: "Why do earthquakes happen?"— Presentation transcript:

1 Why do earthquakes happen?
The two plates cannot move past each other easily. The two plates become locked, pressure builds up. Suddenly, the pressure is released and the plates move quickly. This sudden movement causes the earthquake

2 Epicentre and Focus Epicentre Focus seismic waves

3 Match up the correct keyword with its meaning.
Earthquakes are… Conservative margins are… Plate boundaries are… Destructive margins are… A seismograph is … The focus is…. Epicentre… ..where the earthquake begins in the crust. ..an instrument to measure earthquakes. ..a movement or tremor in the earths crust. ..where two plates move alongside each other. ..where one plate is forced below another. ..directly above the focus on the earths surface. ..a boundary between two plates.

4 How we can limit the damage
caused by earthquakes

5 Can we predict earthquakes?

6 NO WE CANNOT PREDICT EARTHQUAKES
Changing water level in wells Smaller tremors can be recorded by seismograph predict But none of these are accurate. The real answer is NO WE CANNOT PREDICT EARTHQUAKES animals can act strangely before the earthquake

7 How can we plan for an earthquake?

8 Be Prepared Fix furniture to walls Fire extinguishers
Know how to shut off water, gas and electricity Be able to call the emergency services Identify a meeting point outside of the house. Every house should have an emergency kit

9 Protective outer clothing,
What would you put in your emergency kit? First aid kit, Food in cans, Sleeping bags, Protective outer clothing, Sturdy shoes, Water supplies, Torch & batteries, Battery powered radio

10 How could we be prepared in school?
"EARTHQUAKE, DROP, COVER, HOLD!". Take cover under your desk Hold on to the legs of your desk "Please, everyone, GET BACK IN YOUR SEATS." Try to remain calm. DO NOT PANIC

11 What would it be like to experience an earthquake?


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