EOY Tectonics Key Terms

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Pyroclastic Flow
Composed of ash and rock and can travel up to 200 kmph and be as hot as 2000C.
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Lahars
Pyroclastic Flow mixed with water and turns into a river of mud.
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Volcanic Bombs
A lump of rock that explodes from a volcano, lands, and semi-solidifies.
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Focus
Where the earthquake starts.
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Epicentre
The point on the ground directly above the focus.
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P Waves
Longitudinal waves that are the fastest seismic waves and can travel through liquids and solids.
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S Waves
Transverse waves that can only travel through solids.
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R Waves
Rolling waves that move up and down and side to side that travel through liquids and solids.
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L Waves
Travel across the surface and only travel through solids.
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Seismometer/Seismograph
Recieves and records shockwaves from earthquakes.
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Laser Reflector
Surveys movement between fault lines.
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Strain Meter
A taut wire is set up between two plates and will snap under earthquake movements triggering an alarm.
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Other cards in this set

Card 2

Front

Pyroclastic Flow mixed with water and turns into a river of mud.

Back

Lahars

Card 3

Front

A lump of rock that explodes from a volcano, lands, and semi-solidifies.

Back

Preview of the back of card 3

Card 4

Front

Where the earthquake starts.

Back

Preview of the back of card 4

Card 5

Front

The point on the ground directly above the focus.

Back

Preview of the back of card 5
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