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Earthquakes

Earthquakes. By: Theresa, Jimmy, Cristina. Warm-up Activity. Write 3-5 sentences on what you know about earthquakes. Objective. Today you will learn about causes and effects of earthquakes around the world and be able to locate the epicenter on a Seismograph. What is an earthquake.

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Earthquakes

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  1. Earthquakes By: Theresa, Jimmy, Cristina

  2. Warm-up Activity Write 3-5 sentences on what you know about earthquakes. Objective Today you will learn about causes and effects of earthquakes around the world and be able to locate the epicenter on a Seismograph.

  3. What is an earthquake • A movement, or shaking of the ground because of shifting of the plates. What causes an earthquake? Release of energy in the earths crust. Strain that builds up between lithospheric plates.

  4. Effects of an earthquake • Damaged buildings • Landslides • Tsunamis • Fires • Loss of human and animal life • Deformed ground surface • http://neic.usgs.gov/neis/education/eqeffects/eqflood.mov

  5. EPICENTER The point on Earth’s surface directly above the focus. FOCUS FAULT Where energy is released and that energy travels away from it in all directions Most earthquakes originate at faults along plate boundaries.

  6. Foreshock vs. Aftershock Foreshock Aftershock • Small quake that comes before a major earthquake. • Small shock that comes after a major earthquake.

  7. The difference between a seismograph and seismogram Seismograph A seismograph detects and records waves made from earthquakes. A seismograph is used to locate an earthquakes’ epicenter and measure the magnitude of the earthquake. Seismogram Is a record sheet placed on a drum attached to a base that is located in bedrock. What is magnitude? A measure of the amount of energy released in an earthquake.

  8. 3 seismographs are always needed to locate the epicenter of an earthquake.

  9. Ending Question • Write critically on how an earthquake is formed and the effects it has on the world around it.

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