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    The Internal Structure of The Earth g12

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    Ayhen Manalo - Rañeses
    The Earth is composed of four main layers - a thin crust on top, a thick mantle below that composed of hot rock, a liquid outer core of molten nickel and iron, and a solid inner core of iron at the very center. Heat circulates within the mantle via convection currents, and the boundaries between layers can be detected by analyzing seismic waves from earthquakes.

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    The Internal Structure of The Earth g12

    Uploaded by

    Ayhen Manalo - Rañeses
    107 views13 pages
    The Earth is composed of four main layers - a thin crust on top, a thick mantle below that composed of hot rock, a liquid outer core of molten nickel and iron, and a solid inner core of iron at the very center. Heat circulates within the mantle via convection currents, and the boundaries between layers can be detected by analyzing seismic waves from earthquakes.

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    The Internal Structure of the Earth g12

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    The Earth is composed of four main layers - a thin crust on top, a thick mantle below that composed of hot rock, a liquid outer core of molten nickel and iron, and a solid inner core of iron at the very center. Heat circulates within the mantle via convection currents, and the boundaries between layers can be detected by analyzing seismic waves from earthquakes.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    107 views13 pages

    The Internal Structure of The Earth g12

    Uploaded by

    Ayhen Manalo - Rañeses
    The Earth is composed of four main layers - a thin crust on top, a thick mantle below that composed of hot rock, a liquid outer core of molten nickel and iron, and a solid inner core of iron at the very center. Heat circulates within the mantle via convection currents, and the boundaries between layers can be detected by analyzing seismic waves from earthquakes.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 13

    Lesson 5.

    THE INTERNAL STRUCTURE


    OF THE EARTH
    OBJECTIVES
    • I can identify the layers of
    the Earth
    • I can differenciate the
    layers of the Earth from
    each other.
    Crust - thin outermost layer of the Earth; is
    of two different types: continental crust and
    oceanic crust
    1. continental crust is 40-70 km thick
    and made up of dense granitic
    rocks(Alumina 15.2%, Silica 60.2%)
    2. oceanic crust -5 km thick and made
    up o denser basaltic rocks (alumina
    16.5%, silica 48.6%)
    Mantle
    • A semisolid, rocky, and very hot layer
    • layer of the Earth between the crust and
    the core; makes up the about 83% of
    earth's interior
    • composed of ferro-magnesium silicate
    rocks
    • top layer(900℃), below (1000℃-3700℃)
    Outer core
    • located below the mantle
    • the only liquid layer of the earth
    • made up of molten nickel and iron
    • 2270 km thick
    • temperature 3700℃ to 4300℃
    Inner core
    • has the diameter of about 1220 km
    • composed mostly of solid iron
    • extremely hot about 6000℃
    Lithosphere
    • made up of crust and upper mantle

    Asthenosphere
    -Below the lithosphere
    -about 180 km thick
    -contains magma
    • Convection Current - heat energy
    circulates and traveling upward from the
    hot inner mantle to the cooler outer
    mantle
    BOUNDARIES BETWEEN LAYERS OF
    THE EARTH

    • Mohorovicic discontinuity
    • Gutenberg discontinuity
    • Lehman discontinuity
    Siesmic waves
    • travel through the planet when
    an earthquake occurs
    • when block of rocks break
    • when volcano erupts
    • or when tectonic plates move

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