The Restless Earth-What are earthquakes and where do they occur? (1.6) 3.0 / 5 based on 1 rating ? GeographyRock landscapes and processesGCSEAQA Created by: SofalofCreated on: 06-11-12 17:59 The place where an earthquake begins is called... The focus 1 of 13 Is the epicentre on the surface or underground? On the surface 2 of 13 What is the order of shock waves which emanate from the epicentre? Primary waves (underground P-waves), Secondary waves (underground S-waves), Transverse waves (overground S-waves) and Longitudinal waves (L-waves) 3 of 13 What kind of particle movement occurs in P-waves? Contractions and expansions 4 of 13 What kind of particle movement occurs in an S-wave? A sideways movement at a right angle to the wave's direction of travel 5 of 13 What kind of particle movement occurs in an L-wave? An up and down movement 6 of 13 What is the line graph that is created by a seismomograph called? A seismogram 7 of 13 What does the logarithmic nature of the Richter scale mean? That for every increase of one, the intensity of the earthquake is increased ten times 8 of 13 Why do earthquakes occur at destructive plate margins? Because the pressure built up from the sinking of the subducting plate is periodically released 9 of 13 Why do earthquakes occur at constructive plate margins? Because of the friction and pressure caused by the plates moving apart 10 of 13 Why do earthquakes occur at conservative plate margins? Because the plates stick together while moving past eachother. Stresses and pressure build 11 of 13 The Mercalli scale is... Subjective 12 of 13 Stage 5 of the Mercalli sale is... Felt by most people, dishes and windows broken 13 of 13
The Restless Earth-What landforms are found at different plate boundaries? (1.2) 3.5 / 5 based on 2 ratings
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