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Daily Review #6

Daily Review #6. How are earthquakes created? How are P, S and surface waves similar? Different? What is a tsunami and how is it made?. Volcanic Eruptions. 10,000 times stronger than atomic bomb Volcanoes – what are they? Destructive Creative. What’s Inside?. Magma vs. lava

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Daily Review #6

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  1. Daily Review #6 • How are earthquakes created? • How are P, S and surface waves similar? Different? • What is a tsunami and how is it made?

  2. Volcanic Eruptions • 10,000 times stronger than atomic bomb • Volcanoes – what are they? • Destructive • Creative

  3. What’s Inside? • Magma vs. lava • Magma chamber • Vents

  4. Convergent Boundaries • Subduction • Oceanic subducted • Produces magma • Magma rises to form volcano

  5. Explosive Eruptions • Rare • Destructive • Produce clouds of • Debris • Ash • Gas

  6. Pyroclastic Flows • Produced in small amounts of time, large amounts of material • Lahar • Faster than a hurricane • Temperatures greater than 700 deg. Celsius • Deadly

  7. Divergent Boundaries • Rift zone • Filled by magma • Mid-ocean ridges • Most volcanic activity • Iceland, island of Surtsey

  8. Nonexplosive Eruptions • Most common • Produce • Calm lava flows • Huge amounts of lava • Shape our world • Islands in the Pacific • Sea floor • NW U.S.

  9. Hot Spots • Examples • Volcanically active • Far from plate boundary • Theories • Mantle plumes • Cracks in crust • Move over time

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