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OLM Science6_6



Grade 6, Chapter 6

Grade 6, Chapter 6



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    OLM Science6_6 OLM Science6_6 Presentation Transcript

    • Chapter 6 Plate Tectonics Inside the Earth Section 1
    • Earth Layers
      • The Earth is divided into four main layers.
        • *Crust
        • *Mantle
        • *Core
    • The Crust
      • * The Earth’s crust is like the skin of an apple. It is the outer most layer.
      • *The crust makes up 1% of the Earth.
      • * The crust of the Earth is broken into many pieces called plates.
    • The Mantle
      • The mantle is the layer between the crust & the core.
      • The mantle is the largest layer of the Earth.
      • The mantle is divided into two regions: the upper and lower sections.
    • Core
      • * The core extends from the bottom of the mantle to the center of the Earth.
      • * The outer core is liquid.
      • * The inner core is a solid.
    • Asthenosphere
      • * Soft layer of the mantle on which pieces of the lithosphere move.
    • Lithosphere
      • The outermost ridge layer of the Earth
    • Mesosphere
      • Beneath the Asthenosphere is the strongest part of the mantle
    • Outer Core
      • Liquid layer of the Earth’s core
    • Inner Core
      • Solid dense center of our planet
    • Tectonic Plates
      • Pieces of the lithoshpere that move around on the top of the asthenosphere
    • Chapter 6 Plate Tectonics Restless Continents Section 2
    • Continental Drift
      • Continents can drift apart from one another and have done so in the past
    • The Break up of Pangea
      • 245 Million years ago
    • Laurasia & Gondwana
      • 180 Million years ago
    • North America, Eurasia, Africa, India, South America, Antarctica
      • 65 Million years ago
    • Sea-floor spreading
      • How a new oceanic lithosphere is created as older materials are pulled away
    • Sea-floor spreading
    • Magnetic Reversal
      • Earth’s magnetic poles change positions
    • Chapter 6 Plate Tectonics The theory of Plate Tectonics Section 3
    • Plate Tectonics
      • Earth’s lithosphere is divided into tectonic plates that move around the top of the asthenosphere
    • Ridge Push
      • Lithosphere is higher then it is where it sinks beneath the continental lithosphere
    • Slab Pull
      • When an oceanic plate collides with the continental plate. The oceanic plate is forced into the asthenosphere
    • Convection
      • Hotter material deep within the Earth rises while cooler material sinks
    • Convergent Boundaries
      • When two tectonic plates push into one another
        • Continental/Continental Collisions
        • Continental/Oceanic Collusions
        • Oceanic/Oceanic Collusions
    • Continental/Continental Collisions
      • When 2 tectonic plates with continental crust collide
    • Continental/Oceanic Collusions
      • When a tectonic plate with continental crust crashes into a plate with oceanic plates
    • Oceanic/Oceanic Collusions
      • When two oceanic plates collide
    • Divergent Boundaries
      • When two tectonic plates move away from one another
        • Moving apart
    • Moving Apart
      • Two tectonic plates move apart from each other
    • Transform Boundaries
      • The boundary between two tectonic plates that slide past each other
        • Sliding Past
    • Sliding Past
      • Two tectonic plates slide past each other
    • Chapter 6 Plate Tectonics Deforming the Earth’s Crust Section 4
    • Stress
      • The amount of force that is put on a given material
    • Compression
      • The type of stress that occurs when an object is squeezed, when 2 tectonic plates collide
    • Tension
      • Stress that occurs when forces act to stretch an object
    • Folding
      • Rock layers bend due to compression of the Earth’s crust
        • Anticline
        • Syncline
        • Monocline
    • Anticline
    • Syncline
    • Monocline
    • Fault
      • The surface along which rocks break & slide past each other
    • Normal Fault
      • The hanging wall moves down relative to the footwall
    • Reverse Fault
      • The hanging wall moves up relative to the footwall
    • Strike-slip Fault
      • Rocks break & move horizontally
    • Folded Mountains
      • Rock layers are pushed upward
    • Fault Block Mountains
      • Large blocks of the Earth’s crust drop relative to other blocks
    • Volcanic Mountains
      • Form over the type of convergent boundaries that include subduction zones