Fault - Fracture in the Earth's crust caused when too much stress builds up, Elastic Energy - Energy that builds up in the crust due to stress, Focus - Location inside the crust where a fault first fractures, Epicentre - Location on the surface of the earth directly above the focus, Foot Wall - Fault block that lies above the fault line, Hanging Wall - Fault block that lies below the fault line, Normal Fault - Fault caused by tension stress near divergent plate boundaries or sometimes subduction zones, Reverse Fault - Fault caused by compression stress near convergent plate boundaries, Strike Slip Fault - Fault caused by shear stress near transform plate boundaries, Converging Boundary - When two plates move together and collide, Diverging Boundary - When two plates move apart in opposite directions, Transform Boundary - When two plates try to slide sideways past each other, Body Waves - Seismic waves that can travel through interior of the Earth eg. S and P waves, Surface Waves - Seismic waves that only travel along the surface of Earth eg. Love and Rayleigh waves, P waves - Pressur waves arrive first, S waves - Shear waves arrive second, Seismometer - Device used to measure incoming seismic waves from an earthquake, Kinetic energy - Energy released when the crust reaches its elastic limit and suddenly breaks, Seismic waves - Movement of energy in the form of oscillating matter,

Earthquakes

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