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Bellwork (3/24/14)

Bellwork (3/24/14). Where is the Earth’s magnetic field produced? The inner and outer core. Magnetic Storm. Answer the questions from the video on a separate sheet of paper. Bellwork (3/25/14). How often, on average, does the Earth reverse its magnetic field?. Bellwork (3/25/14).

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Bellwork (3/24/14)

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  1. Bellwork (3/24/14) • Where is the Earth’s magnetic field produced? • The inner and outer core.

  2. Magnetic Storm • Answer the questions from the video on a separate sheet of paper

  3. Bellwork (3/25/14) • How often, on average, does the Earth reverse its magnetic field?

  4. Bellwork (3/25/14) • How often, on average, does the Earth reverse its magnetic field? • About every 200,000 years

  5. The Dynamic Earth 3/25/14

  6. Crust Mantle Outer Core Inner Core The Earth’s Structure

  7. The liquid iron outer core flows around the solid inner core This gives it a dynamo effect The cause of earth's magnetism Earth’s Magnetism

  8. The south magneticpole is located in the north geographic region The north magneticpole is located in the south geographic region Earth’s Magnetic Poles

  9. Earth’s Magnetic Field • Deflects most of the cosmic ray’s • Reverse polarity about every 200,000 years • Last reversal was about 780,000 years ago

  10. How do we know the structure of the Earth?

  11. Earthquakes and Seismic Waves • P-Waves are longitudinal waves that can go through solids and liquids • S-Waves are transverse waves that can only go through solids

  12. Seismic Wave Animation • https://www.youtube.com/watch?v=JQ27PNRe4zA • http://neic.usgs.gov/neis/eq_depot/2002/eq_021103/ak_seismic_waves.html

  13. Science Fiction Story • Story needs to be 600 words minimum • What would it be like to live through a magnetic reversal • Due Dates: • - Rough Draft due Tues. 4/1/14 • - Final Draft and Reviews due Tues. 4/8/14

  14. This Week’s Agenda • Today – Brainstorm or start rough draft of the Science Fiction Story • Tomorrow – Start the Magnetism Lab • Thur. – Finish the Magnetism Lab • Fri. – Post Lab and magnetism notes

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