EOY Tectonics Key Terms 0.0 / 5 ? GeographyTectonicsIGCSEWJEC Created by: 10SandersDCreated on: 25-05-14 18:04 Pyroclastic Flow Composed of ash and rock and can travel up to 200 kmph and be as hot as 2000C. 1 of 12 Lahars Pyroclastic Flow mixed with water and turns into a river of mud. 2 of 12 Volcanic Bombs A lump of rock that explodes from a volcano, lands, and semi-solidifies. 3 of 12 Focus Where the earthquake starts. 4 of 12 Epicentre The point on the ground directly above the focus. 5 of 12 P Waves Longitudinal waves that are the fastest seismic waves and can travel through liquids and solids. 6 of 12 S Waves Transverse waves that can only travel through solids. 7 of 12 R Waves Rolling waves that move up and down and side to side that travel through liquids and solids. 8 of 12 L Waves Travel across the surface and only travel through solids. 9 of 12 Seismometer/Seismograph Recieves and records shockwaves from earthquakes. 10 of 12 Laser Reflector Surveys movement between fault lines. 11 of 12 Strain Meter A taut wire is set up between two plates and will snap under earthquake movements triggering an alarm. 12 of 12
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