• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content

Loading…

Flash Player 9 (or above) is needed to view presentations.
We have detected that you do not have it on your computer. To install it, go here.

Like this presentation? Why not share!

Yr9 volcanoes revision

on

  • 4,798 views

Revision points for volcano end of unit test.

Revision points for volcano end of unit test.

Statistics

Views

Total Views
4,798
Views on SlideShare
2,998
Embed Views
1,800

Actions

Likes
0
Downloads
50
Comments
0

3 Embeds 1,800

http://ks3geoblogbytes.wordpress.com 1798
url_unknown 1
http://translate.googleusercontent.com 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Yr9 volcanoes revision Yr9 volcanoes revision Presentation Transcript

    • ST IVO SCHOOL GEOGRAPHY DEPARTMENT
      REVISION FOR YEAR 9 VOLCANO EXAM
      Photos Courtesy of www.geographyphotos.com & R Chambers
    • Structure Of The Earth
    • At a constructive plate boundary, two plates move apart. As the two plates move apart, magma rises up to fill the gap. This causes volcanoes at this type of boundary. However, since the magma can escape easily at the surface the volcano does not erupt with much force.
      E.g. Mid-Atlantic Ridge.
      Constructive Plate Boundary
    • A destructive plate boundary is found where a continental plate meets an oceanic plate.
      The oceanic plate subducts (sinks) under the continental plate because it is denser. Friction melts the plates. This melted plate is now hot, magma. If it reaches the surface, the liquid rock forms a volcano.
      E.g. Nazca and South American Plate
      Destructive Plate Boundary
    • Conservative plate boundaries exist where two plates slide past each.
      No volcanoes are found along these plate boundaries, but earthquakes do occur.
      E.g. San Andreas Fault, San Francisco
      Conservative Boundary
    • Collision boundaries occur when 2 continental plates move together. This causes the material between them to buckle and rise up, forming fold mountains.
      E.g. Himalayas
      Collision Boundary
    • STRUCTURE OF A VOLCANO
      Steam, Ash, Gas
      Volcanic Bombs
      Crater
      Secondary Cone
      Lava Flow
      Vent
      Magma Chamber
    • Geothermal Energy e.g. Iceland
      Minerals e.g. gold and copper, Mt St Helens
      Tourism e.g. Mt Fuji
      Why live near
      volcanoes?
      Fertile Soil e.g. Mt Etna
      Scientific Research e.g. Mt St Helens
    • Montserrat Case Study
      Montserrat is found in the Caribbean and is part of the Leeward Islands.
      It is part of a island arc and was formed by volcanic eruptions.
      North American Plate
    • After 2 years of rumbling a huge eruption occurred on July 25 1997.
      In July 1995 the dormant volcano of Soufriére Hills started to rumble back to life.
      Montserrat is a Caribbean island famous for beautiful beaches and sea.
      Background Information
    • Underneath Montserrat the North American plate is slowly being forced under the Caribbean plate.
      The Soufrière Hills Volcano produces a thick sticky lava.
      Montserrat is situated on a destructive plate boundary.
      The lava was thick and it built up at the top of the volcano in a dome until it collapsed.
      Causes of the Eruption
    • Airport was evacuated and closed.
      Capital City (Plymouth) almost totally destroyed and evacuated.
      19 people killed and many more injured.
      A total of at least 4 square kilometres of land was covered by the pyroclastic flows and surges.
      People evacuated to the north of the island.
      Rich farmland destroyed by mudflows and covered by layers of ash.
      Destroyed between 100 -150 houses.
      About 8000 residents left the island to live somewhere safer.
      The southern part of the island is off limits and people are fined if they are found there.
      Effects of the Eruption
    • INSTRUCTIONS
      There are 10 questions for you to have a go at – as you work through the slides, write down the number of the question and your answer.
      At the end of the 10 questions – there are slides with the correct answers on for you to check your answers – GOOD LUCK!
    • Question 1.
      Which of the following is an example of a volcanic eruption?
      Montserrat – 1997
      San Francisco – 1989
      Kobe – 1995
      Tokyo - 1919
    • Question 2.
      Montserrat occurred at a..
      destructive boundary
      constructive boundary
      collision boundary
      conservative boundary
    • Question 3.
      Re-arrange the following to give the correct order explaining the eruption of a volcano
      friction between plates and heat from the earth causes melting of the oceanic plate
      two plates move towards each other
      subduction of the lighter oceanic plate occurs
      molten magma rises and erupts
    • Question 4.
      A constructive boundary is..
      where two plates move side by side
      where two plates move together
      where two plates move away from each other.
    • Question 5.
      Which of these does NOT occur at a constructive boundary?
      a mid ocean ridge
      volcanoes
      earthquakes
      fold mountains
    • Question 6.
      At this boundary two plate move apart from each other
      collision boundary
      constructive boundary
      destructive boundary
      conservative boundary
    • Question 7.
      At this boundary two plates of continental crust meet
      collision boundary
      constructive boundary
      conservative boundary
      destructive boundary
    • Question 8.
      Here an oceanic and continental plate move together..
      destructive Boundary
      constructive boundary
      conservative boundary
      collision boundary
    • Question 9.
      The outer layer of the earth is called the..
      crust
      mantle
      core
    • Question 10.
      This process occurs where two plates meet together..
      precipitation
      subduction
      transpiration
      divergence
    • Answers Slide
      Question 1.
      Which of the following is an example of a volcanic eruption?
      Montserrat – 1991
      San Francisco – 1989
      Kobe – 1995
      Tokyo - 1919
    • Answers Slide
      Question 2.
      Montserrat occurred at a..
      destructive boundary
      constructive boundary
      collision boundary
      conservative boundary
    • Question 3.
      Re-arrange the following to give the correct order explaining the eruption of a volcano
      Answers Slide
      friction between plates and heat from the earth causes melting of the oceanic plate
      two plates move towards each other
      subduction of the lighter oceanic plate occurs
      molten magma rises and erupts
      3
      1
      2
      4
    • Answers Slide
      Question 4.
      A constructive boundary is..
      where two plates move side by side
      where two plates move together
      where two plates move away from each other.
    • Question 5.
      Which of these does NOT occur at a constructive boundary?
      Answers Slide
      a mid ocean ridge
      volcanoes
      earthquakes
      fold mountains
    • Answers Slide
      Question 6.
      At this boundary two plate move apart from each other
      collision boundary
      constructive boundary
      destructive boundary
      conservative boundary
    • Answers Slide
      Question 7.
      At this boundary two plates of continental crust meet
      collision boundary
      constructive boundary
      conservative boundary
      destructive boundary
    • Answers Slide
      Question 8.
      Here an oceanic and continental plate move together..
      destructive Boundary
      constructive boundary
      conservative boundary
      collision boundary
    • Answers Slide
      Question 9.
      The outer layer of the earth is called the..
      crust
      mantle
      core
    • Answers Slide
      Question 10.
      This process occurs where two plates meet together..
      precipitation
      subduction
      transpiration
      divergence