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   State the structure of Earth
   Label the worlds crustal plates
   Explain that convection current causes
    plates to move
   Innermost part of the Earth.
   3450km.
   Consists mainly of iron and nickel
   Very high temperature of 4000 ◦C




    Quiz: How will the high temperature
             affect the crust?
   Middle layer.
                     2900km thick
                     Mostly solid with the upper most layers
                      consisting of molten rocks known as
                      magma.



Lava flow on
Hawaii. Lava is
the extrusive
equivalent of
magma.


  Quiz: What is the difference between
          magma and lava?
•   Outermost layer of the Earth.
•   60km thick and floats on denser mantle.
•   Broken up into pieces known as crustal plates.
•
   Continental plates are lighter and consist of
    land masses.
   Oceanic plates are heavier as they consist of
    large water masses.




Quiz: what happens when an oceanic
plate collides with a continental plate?
World's Crustal plates
Quiz: Explain how convection currents
       affects plate movement.
    Extreme heat from the
     interior of the Earth causes
     the magma to be heated up,
     expand and rises.
     This generates convection
     currents.

    Quiz: Name an example of convection
    current that u can find in the kitchen
   As the convention currents reach the
    crust above, they spread out carrying
    the plates above with it. Plates are
    dragged apart.
    As the magma cools, it gradually
    sinks back down to be re-heated.
    The process causes the plates to
    move towards each other.
12th sept Objective
• Describe and explain the 3
  types of plate movements
• Identify the landforms that are
  formed
(1)   Convergent plates movement-
      Crustal plates move towards each
      other
(2)   Divergent plates movement –
      Crustal plates moving away from
      each other.
(3)   Transform plate movement- plates
      sliding past each other.
Scenario 1: continental plate + oceanic plate
Scenario 1: continental plate + oceanic plate




Quiz: Which plate is heavier? What
       landform is created?
Scenario 1: continental plate + oceanic plate
      Converging plate movement
   Convention currents within magma pulls two
    plates together.
   The heavier oceanic plate get subducted
    while the lighter continental plate floats on it.
   Subducted part of the plate melts under high
    heat to form magma.
   Magma then rises above the Earth’s surface
    to form volcanoes.
Scenario 2: continental plate + continental plate
Converging plate movement




Quiz: What is the landform created?
Scenario 2: continental plate + continental plate
       Converging plate movement
   When convention currents within magma push two
    crustal plates together, there is immense collision
    force.
   Rocks between the plates are pushed upwards,
    folded to form fold mountain.
   Eg: Himalayas mountains, Andes and Rocky.
   When the convention currents in magma pull 2
    oceanic plates apart, a ridge may form at the
    boundaries.
   Magma may rise up the cracks to from
    volcanoes.
Quiz: What landforms are formed when 2
       continental plates collide?
• A ridge is a
  geological feature
                         Ridge
  consisting of a
  chain of mountains
  or hills that form a
  continuous
  elevated crest for
  some distance.
• Ridges are usually
  termed hills or
  mountains as well,
  depending on
  size.
   Occurs at conservative plate boundary
    whereby the plates are not created nor
    destroyed
   Plates slide past each other.
   Eg; San Francisco fault.
Summary
• Plates move because of convection currents
  within the earths crust

• There are 3 types of plate movements

• Convergent, divergent and transform plate
  movements
Stay back after lesson

       No ATT/ CT corrections: Shao yang,
11th
       Douglas, Jordan, Jia Heng, Jing Xuan
sept
             ,Ammar, Darren, Bryan


18th   Revise map reading : Khoo Xin Yee,
sept   Clester, Douglas, Jing Xuan, Darimi


25th   Revise map reading : Khoo Xin Yee,
sept   Clester, Douglas, Jing Xuan, Darimi
Content page




  11.                      The earths structure

  12.                   3 types of crustal movement

  13.          Landforms created by crustal plate movements

  14.                           Vulcanicity
Lesson objectives

• Know where the pacific ring of fire is
  located at

• Draw diagrams of the 3 types of plate
  movement
crustal plate movements




Fold mountains and volcanoes
Pacific ring of fire
 The Pacific Ring of Fire (or just The Ring of Fire) is an
area where a large number of earthquakes and volcanic
   eruptions occur in the basin of the Pacific Ocean.




Quiz: Why are the similarities
between the locations of the
        volcanoes?
and volcanoes




Fold mountains and volcanoes are formed along the plate
boundaries.                             Refer to text pg 75
plate movement
plate movement
plate movement
Objective
• Label the parts of the volcano

• Describe the 3 stages/types of
  volcano
Row row row your boat
   gently down the
        stream

Quiz: What happens after a volcanic
             eruption?
   Vulcanicity is the process by which the
    molten materials are forced onto the Earth’s
    surface.
   The molten rock found below the earth is
    called magma. When magma flows onto the
    earth, it becomes lava.
   Lava flows through the earths surface
    through a single opening.
   Overtime, the layers of lava forms a
    volcano.
cinder

Pipe




       Layers of
       lava
Structure of a volcano
        • A volcano is an opening in
          the earths crust from which
          materials are ejected
        • During an eruption, molten
          rock or magma is ejected
          onto the earths surface as
          lava.
        • Gases such as steam and
          carbon dioxide may also be
          released.
   Crater – opening at the top of a volcano where
    lava, rock fragments, gases and ash are ejected.
   Lava – Molten rocks that have been erupted onto
    the Earth’s surface.
   Pipe – Channel joining the magma chamber to
    the top of the volcano which the magma flows
    through.
   Vent- Opening in the Earth’s crust where magma
    rises and are ejected out
   Magma chamber – An underground
    cavity which contains molten rocks.
   Cone – This is built up by
    successive layers of cooled and
    solidified lava, mixed with ash and
    rock fragments.
Quiz: Why are the volcanoes in different
               shapes?
(1)Basic  lava flow
•- more fluid and thin and the lava travels over a longer
 distance before solidifying.
•- lava flow faster and spread widely
•- Gives rise to a more gentle-sloping volcano (shield
 volcano).

(2) Acidic lava flow
• Lava is thicker and more viscous.
• Travels over a shorter distance and cools and
   solidify faster.
• Gives rise to volcano with steeper slopes.
Other examples are Mt Mayon in the
Philippines; Mt Merapi in Java.
   One of the best examples of a dormant volcano is
    Mauna Kea, one of the five volcanoes that make
    up the Big Island of Hawaii.
   The peak of Mauna Kea is 4,207 meters above
    sea level, but 10,203 meters above the base of the
    floor of the Pacific Ocean.
   Geologists classify Mauna Kea in the post-shield
    stage of volcanic evolution. It stopped being a
    shield volcano about 200,000 years ago.
   Mauna Kea’s last eruption is thought to be 2460
    BC.
(Different stages)

• (1) Active volcano – A volcano that is
  currently erupting or is likely to erupt soon.
  (frequently)
• (2) Dormant volcano – A volcano that is
  presently inactive but may erupt in the
  future(occasional)
• (3) Extinct volcano – A volcano that is dead
  and not expected to erupt again.
Summary
• Label the 7 parts of the volcano

• Describe the 3 stages/types of
  volcano: active, dormant, extinct
   Hot ash, gas and rocks are poisonous and
    hazardous to air. Disruption to traffic.
   High temperature lava flow, volcanic
    bombs, cinder and ash may kill people, bury
    farmlands and houses and destroy
    infrastructure.
   Volcanic eruption may trigger landslides
    that kill livestock and bury houses and
    people.
•
   Soil near volcanoes are rich and fertile which is
    suitable for crops to be grown.
   Geothermal energy generated by the heat from
    volcanoes is used to produce electricity for
    development of industries.
   Source of precious stones and minerals like
    diamonds, copper, zinc, gold and silver etc
    provide mining jobs.
   Volcanic rocks provide materials for landscaping,
    construction and road-building.

   A form of tourism revenue as many religions
    and cultural rituals are conducted by people
    living on the slopes of volcanoes.
   Beautiful landscapes of volcanoes serve as
    a form of tourist attraction.
   Eg Bali and Java.
   This provides jobs and revenues to the
    locals.
Mock test question
If volcanic eruptions are a
dangerous threat, why do
 people still choose to live
   near volcanoes? [4m]
If volcanic eruptions are a dangerous threat, why do people still
                choose to live near volcanoes? [4m]


• The solidified lava provides fertile land for agriculture

• Volcanic areas are rich in precious stones and minerals
  such as silver and zinc

• Volcanic areas can be tourist destinations which can
  provide a source of income for people living near the
  volcanoes

• There is a shortage of land for settlement

• The volcano has erupted for a long period of time and
  people tend to forget the dangers that they pose

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Fold mts& volcanoes blog

  • 1. State the structure of Earth  Label the worlds crustal plates  Explain that convection current causes plates to move
  • 2.
  • 3. Innermost part of the Earth.  3450km.  Consists mainly of iron and nickel  Very high temperature of 4000 ◦C Quiz: How will the high temperature affect the crust?
  • 4. Middle layer.  2900km thick  Mostly solid with the upper most layers consisting of molten rocks known as magma. Lava flow on Hawaii. Lava is the extrusive equivalent of magma. Quiz: What is the difference between magma and lava?
  • 5. Outermost layer of the Earth. • 60km thick and floats on denser mantle. • Broken up into pieces known as crustal plates. •
  • 6.
  • 7. Continental plates are lighter and consist of land masses.  Oceanic plates are heavier as they consist of large water masses. Quiz: what happens when an oceanic plate collides with a continental plate?
  • 9. Quiz: Explain how convection currents affects plate movement.
  • 10. Extreme heat from the interior of the Earth causes the magma to be heated up, expand and rises.  This generates convection currents. Quiz: Name an example of convection current that u can find in the kitchen
  • 11. As the convention currents reach the crust above, they spread out carrying the plates above with it. Plates are dragged apart.  As the magma cools, it gradually sinks back down to be re-heated. The process causes the plates to move towards each other.
  • 12. 12th sept Objective • Describe and explain the 3 types of plate movements • Identify the landforms that are formed
  • 13.
  • 14. (1) Convergent plates movement- Crustal plates move towards each other (2) Divergent plates movement – Crustal plates moving away from each other. (3) Transform plate movement- plates sliding past each other.
  • 15. Scenario 1: continental plate + oceanic plate
  • 16. Scenario 1: continental plate + oceanic plate Quiz: Which plate is heavier? What landform is created?
  • 17. Scenario 1: continental plate + oceanic plate Converging plate movement  Convention currents within magma pulls two plates together.  The heavier oceanic plate get subducted while the lighter continental plate floats on it.  Subducted part of the plate melts under high heat to form magma.  Magma then rises above the Earth’s surface to form volcanoes.
  • 18. Scenario 2: continental plate + continental plate Converging plate movement Quiz: What is the landform created?
  • 19. Scenario 2: continental plate + continental plate Converging plate movement  When convention currents within magma push two crustal plates together, there is immense collision force.  Rocks between the plates are pushed upwards, folded to form fold mountain.  Eg: Himalayas mountains, Andes and Rocky.
  • 20. When the convention currents in magma pull 2 oceanic plates apart, a ridge may form at the boundaries.  Magma may rise up the cracks to from volcanoes.
  • 21. Quiz: What landforms are formed when 2 continental plates collide?
  • 22. • A ridge is a geological feature Ridge consisting of a chain of mountains or hills that form a continuous elevated crest for some distance. • Ridges are usually termed hills or mountains as well, depending on size.
  • 23. Occurs at conservative plate boundary whereby the plates are not created nor destroyed  Plates slide past each other.  Eg; San Francisco fault.
  • 24. Summary • Plates move because of convection currents within the earths crust • There are 3 types of plate movements • Convergent, divergent and transform plate movements
  • 25. Stay back after lesson No ATT/ CT corrections: Shao yang, 11th Douglas, Jordan, Jia Heng, Jing Xuan sept ,Ammar, Darren, Bryan 18th Revise map reading : Khoo Xin Yee, sept Clester, Douglas, Jing Xuan, Darimi 25th Revise map reading : Khoo Xin Yee, sept Clester, Douglas, Jing Xuan, Darimi
  • 26. Content page 11. The earths structure 12. 3 types of crustal movement 13. Landforms created by crustal plate movements 14. Vulcanicity
  • 27. Lesson objectives • Know where the pacific ring of fire is located at • Draw diagrams of the 3 types of plate movement
  • 28. crustal plate movements Fold mountains and volcanoes
  • 29. Pacific ring of fire The Pacific Ring of Fire (or just The Ring of Fire) is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. Quiz: Why are the similarities between the locations of the volcanoes?
  • 30.
  • 31. and volcanoes Fold mountains and volcanoes are formed along the plate boundaries. Refer to text pg 75
  • 35. Objective • Label the parts of the volcano • Describe the 3 stages/types of volcano
  • 36. Row row row your boat gently down the stream Quiz: What happens after a volcanic eruption?
  • 37. Vulcanicity is the process by which the molten materials are forced onto the Earth’s surface.  The molten rock found below the earth is called magma. When magma flows onto the earth, it becomes lava.  Lava flows through the earths surface through a single opening.  Overtime, the layers of lava forms a volcano.
  • 38. cinder Pipe Layers of lava
  • 39. Structure of a volcano • A volcano is an opening in the earths crust from which materials are ejected • During an eruption, molten rock or magma is ejected onto the earths surface as lava. • Gases such as steam and carbon dioxide may also be released.
  • 40. Crater – opening at the top of a volcano where lava, rock fragments, gases and ash are ejected.  Lava – Molten rocks that have been erupted onto the Earth’s surface.  Pipe – Channel joining the magma chamber to the top of the volcano which the magma flows through.  Vent- Opening in the Earth’s crust where magma rises and are ejected out
  • 41. Magma chamber – An underground cavity which contains molten rocks.  Cone – This is built up by successive layers of cooled and solidified lava, mixed with ash and rock fragments.
  • 42. Quiz: Why are the volcanoes in different shapes?
  • 43. (1)Basic lava flow •- more fluid and thin and the lava travels over a longer distance before solidifying. •- lava flow faster and spread widely •- Gives rise to a more gentle-sloping volcano (shield volcano). (2) Acidic lava flow • Lava is thicker and more viscous. • Travels over a shorter distance and cools and solidify faster. • Gives rise to volcano with steeper slopes.
  • 44. Other examples are Mt Mayon in the Philippines; Mt Merapi in Java.
  • 45. One of the best examples of a dormant volcano is Mauna Kea, one of the five volcanoes that make up the Big Island of Hawaii.  The peak of Mauna Kea is 4,207 meters above sea level, but 10,203 meters above the base of the floor of the Pacific Ocean.  Geologists classify Mauna Kea in the post-shield stage of volcanic evolution. It stopped being a shield volcano about 200,000 years ago.  Mauna Kea’s last eruption is thought to be 2460 BC.
  • 46.
  • 47. (Different stages) • (1) Active volcano – A volcano that is currently erupting or is likely to erupt soon. (frequently) • (2) Dormant volcano – A volcano that is presently inactive but may erupt in the future(occasional) • (3) Extinct volcano – A volcano that is dead and not expected to erupt again.
  • 48. Summary • Label the 7 parts of the volcano • Describe the 3 stages/types of volcano: active, dormant, extinct
  • 49. Hot ash, gas and rocks are poisonous and hazardous to air. Disruption to traffic.  High temperature lava flow, volcanic bombs, cinder and ash may kill people, bury farmlands and houses and destroy infrastructure.  Volcanic eruption may trigger landslides that kill livestock and bury houses and people. •
  • 50. Soil near volcanoes are rich and fertile which is suitable for crops to be grown.  Geothermal energy generated by the heat from volcanoes is used to produce electricity for development of industries.  Source of precious stones and minerals like diamonds, copper, zinc, gold and silver etc provide mining jobs.  Volcanic rocks provide materials for landscaping, construction and road-building. 
  • 51. A form of tourism revenue as many religions and cultural rituals are conducted by people living on the slopes of volcanoes.  Beautiful landscapes of volcanoes serve as a form of tourist attraction.  Eg Bali and Java.  This provides jobs and revenues to the locals.
  • 52. Mock test question If volcanic eruptions are a dangerous threat, why do people still choose to live near volcanoes? [4m]
  • 53. If volcanic eruptions are a dangerous threat, why do people still choose to live near volcanoes? [4m] • The solidified lava provides fertile land for agriculture • Volcanic areas are rich in precious stones and minerals such as silver and zinc • Volcanic areas can be tourist destinations which can provide a source of income for people living near the volcanoes • There is a shortage of land for settlement • The volcano has erupted for a long period of time and people tend to forget the dangers that they pose