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Inside the Earth

Inside the Earth. Mr. Reed Earth Science Madras Middle School. What is Inside Earth?. We are not sure? Why? Extreme conditions inside Earth Temperature rises Why? Heat left over from formation of planet and radioactive substances inside Earth’s interior releasing energy Pressure increases

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Inside the Earth

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  1. Inside the Earth Mr. Reed Earth Science Madras Middle School

  2. What is Inside Earth? • We are not sure? Why? • Extreme conditions inside Earth • Temperature rises • Why? Heat left over from formation of planet and radioactive substances inside Earth’s interior releasing energy • Pressure increases • Because of the weight of the rock above

  3. How do we study the inside of the Earth • Rock Samples • Geologists can drill into the Earth and bring up rock samples • Theses samples allow scientists to infer about conditions inside Earth • Seismic Waves (Earthquake waves) • Geologists study how the seismic waves travel through Earth (speed and path) • This data has help geologists realize that the Earth is made up of several different layers

  4. Composition (What it is made of) • Crust • Mantle • Core

  5. Outer layer Solid Rock 5-70 km thick 2 types of crust Oceanic (very thin, made of basalt) Continental (thicker, made of granite) The Crust

  6. Middle layer Very thick layer 3000 km thick Very hot , but solid rock Made up of three sublayers: 1. lithosphere 2.asthenosphere 3.lower mantle The Mantle

  7. The Mantle • Lithosphere • Uppermost part of the mantle • 100 km thick • Lower Mantle • Solid material that extends to the core • Asthenosphere • Bottom part of the mantle • Less rigid, soft rock • Can bend like plastic

  8. The Core • Made mostly of metal irons and nickel • Very hot • 3,486 km thick • Made up of 2 parts: • Outer core and the inner core

  9. The Core • Outer Core • Molten metal • LIQUID LAYER • Inner Core • Solid Metal

  10. Earth’s Magnetic Field • Movement in Earth’s outer core create Earth’s magnetic field

  11. How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core Earth’s Layers

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