Earthquakes and Volcanoes by K0yl8kC

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									Earthquakes and Volcanoes


            By:
       Brianna Shields
       February 8, 2005
                  GOAL
   To explain the theory of plate tectonics
    and to relate it to areas of volcanic and
    earthquake activity
             Assessment
 Use your notes to help you label the
  picture of the lithospheric plates at the
  plate boundaries
 The teacher will go over the answers with
  you in approximately 5 minutes
                  Earthquakes
   How are          Rocks rubbing at fault lines
    earthquakes      Transform/strike slip
    caused?           boundaries
                     Plates that are shearing or
                      faulting
                     Occur on land or in oceans
                  Earthquakes
   What do          1. Destruction of landforms
                      – Destroying cities, mountains, plateaus,
    earthquakes         etc.
    cause?           2. Landslides
                      – Vibrations of a mountain can cause
                        massive movements of rocks down slopes
                     3. Tsunamis
                      – Earthquakes at oceanic plate boundaries
                        can create giant waves
                  Earthquakes
   Parts of an      1. Focus
    earthquake        – Point beneath earth’s surface
                        where rocks break and move
                  Earthquakes
   Parts of an      2. Epicenter
    earthquake        – Point directly above focus, on
                        earth surface, where most violent
                        shaking occurs
                 Earthquakes
   Earthquake      1. Richter Scale- ranks the
    Vocab            intensity of an earthquake
                 Earthquakes
   Earthquake      2. Seismograph- measures the
    Vocab            intensity of an earthquake
Earthquake Damage
Landslides caused by
   Earthquakes
Tsunamis
Tsunamis- Recent One near
        Indonesia
Tsunamis
Tsunamis
Tsunamis
Tsunamis
Tsunamis
Tsunamis
Tsunamis
                Volcanoes
   How do         1. When hot, molten rock
    volcanoes       (magma) spills through cracks in
    form?           the crust, onto earth’s surface
                Volcanoes
   How do         2. Can work through crack’s on
    volcanoes       Earth’s surface
    form?
                Volcanoes
   How do         3. When pressure builds, it can
    volcanoes       push up on land, without
    form?           breaking through
                Volcanoes
   How do         4. Can create new landforms
    volcanoes       when lava hardens
    form?
                 Volcanoes
   Volcano         1. Vent- where lava comes out
    Vocabulary
                 Volcanoes
   Volcano         2. Crater- bowl shaped, at the
    Vocabulary       top of the volcano, with vent at
                     bottom
                 Volcanoes
   Volcano         3. Magma= molten rock below
    Vocabulary       earth’s surface
                    4. Lava= molten rock on earth’s
                     surface
                 Volcanoes
   Volcano         5. Particles ejected from
    Vocabulary       volcanoes:
                     – Dust (smallest)
                     – Ash
                     – Bombs (largest)
                Volcanoes
   Types of       1. Cinder Cones
    volcanoes       – Steep sides
                    – Not very tall
                    – Created by explosive volcano
                Volcanoes
   Types of       2. Shield
    volcanoes       – Gentle slopes
                    – Quiet lava flow builds flat layers
                Volcanoes
   Types of       3. Composite
    volcanoes       – Due to alternating eruptions
                      (violent and gentle)
                    – Sporadic layers of rock, cinder,
                      ash and lava
                Volcanoes
   Activity       1. Active- erupts continuously
    levels of
    volcanoes
                Volcanoes
   Activity       2. Dormant- “sleeping”
    levels of       – Has erupted in near past
    volcanoes       – Currently sleeping
                Volcanoes
   Activity       3. Extinct
    levels of       – No eruptions in modern times
    volcanoes
       Earthquakes & Volcanoes
   Greatest         Occurs in the Ring of Fire
    Earthquake       On the Pacific Plate (Pacific
    and Volcano       Ocean)
    Activity
Ring of Fire
               Assessment
   Please write the following assignment into
    your agenda:
    – Earth’s Structure Review Questions

								
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