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Download blocks of crust slide past each other with no up or down motion
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Earthquake Vocabulary Notecards Weathering • Process of breaking down the Earth’s material by natural processes of water, wind, ice, and chemicals into smaller pieces or sediments • Destructive Process Erosion • Weathered or broken down rock and other material are moved by natural processes, such as water or wind, from place to place • Destructive Movement Deposition • Process where sediments are settled or laid down in a new location • Constructive Process Constructive Force • Force that builds up features on the Earth’s surface or on an existing landform Destructive Force • Forces that destroy features on the Earth’s surface Focus • Point of origin underground where the rocks break producing vibrations and creating an earthquake Earth’s Surface D R A W Fault Line Epicenter • Point above ground on the surface directly above the focus Earth’s Surface D R A W Fault Line Compression • Force that squeezes rock or an object until it folds or breaks Tension • Force that occurs to stretch an object or rock Shear • Force that pushes a mass of rock or an object in opposite directions Fault Line Types • Normal Fault – blocks of crust are pulled away and one block falls down – Occurs at Divergent Boundary with Tension Force • Reverse Fault – blocks of crust are pushed together and one block slides up – Occurs at Convergent Boundary with Compression Force • Strike-Slip Fault – blocks of crust slide past each other with no up or down motion – Occurs at Transform Boundary with Shear Force Normal Fault Pictures **Do NOT Copy** blocks of crust are pulled away and one block falls down Reverse Fault Pictures **Do NOT Copy** blocks of crust are pushed together and one block slides up Strike-Slip Fault Pictures **Do NOT Copy** blocks of crust slide past each other with no up or down motion Types of Seismic Waves • P-Wave (Primary) – first wave from the focus – Push-pull wave that can travel through solids & liquids – Fastest wave • S-Wave (Secondary) – slow wave from the focus – Vibrates crust side to side & up or down – Travels only through solids • Surface Wave – slowest wave from the epicenter – Come from P- & S-Waves that reach the surface – Produce most damage – Stronger near the epicenter Richter Scale • Measures strength of seismic waves on a seismograph • Scale of 1-10 – 10 is the strongest – Each number is 10 times stronger than the number before Richter Scale **Do NOT Copy** When You’re Finished • BBC Plate Tectonics Test Bite **Headphones** • Fault Motion Simulations • Constructive Forces • Destructive Forces • Earthquake Interactive • Forces of Nature **Takes a Few Minutes to Load** • Beat the Quake **Headphones** • Shake, Rattle, & Slide **Headphones**