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What causes a volcano?

What causes a volcano?. L.O: To know how volcanoes are formed. To know the difference between destructive and constructive plates. To be able to label a diagram of what happens in a volcano. What can you remember from last lesson?.

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What causes a volcano?

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  1. What causes a volcano? L.O: To know how volcanoes are formed. To know the difference between destructive and constructive plates. To be able to label a diagram of what happens in a volcano.

  2. What can you remember from last lesson? • Write something know about the structure of a volcano or a volcanoes shape • How confident are you that you can describe the main features of a volcano? Where are you on the confidence scale? Not Confident ok confident

  3. Vent Volcanic cone lava Crater Volcanic bombs Magma chamber

  4. How do volcanoes and earthquakes happen?

  5. Match the “top” with the correct “tail” about plate boundaries. • At a constructive plate boundary... • At a destructive plate boundary... • An oceanic plate is... • A continental plate is... plates are pushing together under enormous stress causing friction and rock to melt. heavier rock forced downwards in a destructive plate boundary. lighter rock forced upwards in a destructive plate boundary. plates move apart allowing molten rock through the gap to create volcanic islands.

  6. Complete the word frame on earthquakes and volcanoes using the word bank below: The ............... of the earth is made up of enormous sections of rock called .................... / ............... . These plates float on top of the ................ that is made up of ................... rock. The energy in .............. / ........................ causes the plates to move. This movement creates .................. at ............... / ........................ which causes earthquakes and ..................... eruptions. Hot liquid called ................ rises through weaknesses called faults and .............. in the crust to form volcanoes. magma friction crust tectonic plates plate boundaries mantle molten volcanic heat convections cracks

  7. Sort the following statements in the correct order to show how volcanoes are formed at plate boundaries. Volcanoes happen at plate boundaries when: • hot molten rock called magma rises through weaknesses in the crust • friction melts the rock as one plate is forced under another • plates rub together • volcanoes erupt on the surface • plates move towards each other

  8. What happens when a volcano erupts? Buildings and property are damaged Lava pours down the mountainside Volcano gently rumbles and steams Rescue services go into action Loud explosion as volcanoe erupts Ash, bombs and lava blasted out of volcano.

  9. Watch the animation… • http://www.youtube.com/watch?v=u2V2kAGp91I&feature=related

  10. Homestudy • Think about 8 problems volcanic eruptions may cause for either: • The environment • People that live in the surrounding area

  11. What is the pattern between tectonic activity and plate boundaries? Amazingly 90% of the world’s earthquakes take place along the ‘Ring of Fire’ because of the severe plate movements. Ring of Fire The Pacific Rim is known as the ‘Ring of Fire’. It is 40,000 kilometres long and it is shaped like a horseshoe. It is made up of island arcs, trenches and volcanic mountains.

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