1. What is an earthquake?
Most earthquakes occur on plate boundaries.
2. What is the force that causes earthquakes?
Friction at the plate boundaries.
3. What causes the earth to shake during an earthquake?
Seismic waves
4. How are the earthquakes located?
Seismographs
5. How do scientists measure the size of earthquakes?
Seismogram
6. What is the difference between the Mercalli and Ritcher scales?
The Mercalli scale measures the damage done, while the Ritcher scale measures how much energy is released.
7. CHALLENGE: How can scientist tell where the earthquakes occurred?
Seismographs
8. What is the relationship between earthquakes and tsunamis?
Tsunamis are caused by earthquakes that happen under the sea.
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