Restless Earth- Volacnoes and earthquakes

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  • Restless Earth
    • Earthquakes
      • plate bounday types
        • constructive
        • destructive
        • conservative
      • key words
        • jerked past
        • subduction zone
        • tension
        • seismic waves
        • vibrations
        • epicentre
          • point on earths surface
        • focus
          • where it occurs
        • falut line
        • convection current
      • measuring
        • richter scale
          • amount of energu released
            • magnitude
          • magnitude measured =seismometer
            • seismograph
          • no upper limit
            • logarithmic
              • 10 times powerful
          • major= above 5
          • minor=1-2
        • Mercalli scale
          • effects
            • eye witness
            • observation
            • word/photo
          • 1- 12
    • volcanoes
      • plate boundary
        • destructive
          • ocanic under continental
            • oceanic =more dense
            • oceanic-melt destrooyed in mantle
              • pool of magma forms
                • magma rise through vents
                  • magma erupt to surface
        • consstructive
          • plates pull apart
            • magma rise-convection current
              • fill gap-volcano
      • types
        • composite cone
          • ash and lava
            • thick ,slow flow
              • harden quick
          • steep sided
          • mount fuji, japan
        • shield
          • lava only
            • dome
              • thick
              • slow flow
              • harden quickly
              • steep sided
          • runny,quick spread
          • wide, low ,flat
        • dome
          • thick
          • slow flow
          • harden quickly
          • steep sided

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