An earthquake is the shaking and vibration of the Earth's crust due to movement of the Earth's plates. This is called plate tectonics.
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Along which plate boundaries do earthquakes occur?
Earthquakes can take place along all plate boundaries.
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How are earthquakes caused?
Earthquakes are caused when tension is released inside the Earth's crust. The tension occurs because two plates (moving in different directions) get stuck.
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What is the focus?
The focus is the point inside the Earth where the pressure is released.
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What is the epicentre?
The epicentre is the point on the Earth's surface that is directly above where an earthquake takes place inside the Earth (the focus).
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In which form is energy from an earthquake released?
Seismic waves.
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What measures the vibrations from an earthquake?
A seismometer.
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Which scale is used to measure the magnitude of an earthquake?
Richter scale
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What is an aftershock?
The smaller vibrations that follow the main earthquake.
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Other cards in this set
Card 2
Front
Along which plate boundaries do earthquakes occur?
Back
Earthquakes can take place along all plate boundaries.
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