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Structure of the Earth

Structure of the Earth. 6 th TAG Earth Science/Kwon. Make this Chart!. Layers by compounds. Crust: 5-100 km thick. Made up of oxygen, silicon, aluminum It is the outer most layer Has two layers: continental & oceanic (oceanic heavier because it contains more iron, calcium, magnesium)

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Structure of the Earth

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  1. Structure of the Earth 6th TAG Earth Science/Kwon

  2. Make this Chart!

  3. Layers by compounds • Crust: 5-100 km thick. Made up of oxygen, silicon, aluminum • It is the outer most layer • Has two layers: continental & oceanic (oceanic heavier because it contains more iron, calcium, magnesium) • Oceanic (sink)/ continental (float)

  4. Layers by compounds • Mantle: Contains most of Earth’s mass (very thick) • 2,900 km thick • Contains more magnesium than crust, so it is heavier than crust • Volcanic lava = magma from mantle

  5. Layers by compounds • Core: the central part of Earth below mantle • Contains 33% of Earth’s mass (1/3) contains mostly iron and small amount of nickel • Contains NO oxygen, silicon, aluminum • It’s radius is 3,430 km

  6. Physical Layers • Divided into 5 Layers by it’s physical characteristics • Lithosphere • Asthenosphere • Mesosphere • Outer Core • Inner Core

  7. Make the chart, please

  8. Lithosphere • Litho- means “rock” • Solid & ridged • Outer most layer • Made up of crust & upper mantle. Lithosphere is divided into pieces called tectonic plates

  9. Asthenosphere • Astheno- means “weak” • Soft & flowing • Underneath lithosphere • Tectonic plates move on top of this layer

  10. Mesosphere • meso- means “middle” • Located between the outer core & asthenosphere • Strong & ridged • Lower part of mantle • It is the thickest layer (2,550 km)

  11. Outer Core • Underneath mesosphere but above inner core • The only liquid layer (liquid iron) • It is 2,200 km thick

  12. Inner Core • The most “center” layer • Solidified layer due to pressure • It is 1,230 km thick • Made of iron • The inner core spins on liquid outer core- creates magnetic field

  13. Plasma • Ionized gas (electron is given or taken away) • No definite shape or volume • Found in stars • Found in “neon” signs • Most common form of state of matter in Universe (not on Earth!) • The center of the Earth is not “plasmic” it is “plastic”…that’s probably the word you were looking for…

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