Science Slideshow

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A slideshow about the Earth

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Science Slideshow

  1. 1. Forces Shaping Earth-Earth’s Interior<br />Chapter 2<br />
  2. 2. Chapter Challenge 1<br />Sydney<br />9/2/10<br />#4 Construction Foreperson <br />
  3. 3. Earth’s Layers<br />Based on evidence from earthquake waves and exposed rocks, scientists have been able to produce a model of Earth’s interior.<br />Earth’s interior has at least four distinct layers-the inner core, the outer core, the mantle, and the crust.<br />Earth is similar to a peach in some ways. It has a thin skin, a thick juicy middle, and a pit.<br />Density, temperature, and pressure are lowest in the crust and greatest in the core<br />
  4. 4. Inner Core<br />The innermost layer of the Earth is the solid inner core.<br />The core is dense and mostly composed of solid iron. <br />When seismic waves reach this layer they speed up, indicating that it is solid. <br />The inner core is the hottest part of the Earth at 5,000 C. <br />The core is under tremendous pressure. <br />Pressure increases because more material is pushing toward Earth’s center as a result of gravity.<br />
  5. 5. Inner Core<br />
  6. 6. Outer Core<br />The outer core lies above the inner core<br />It is thought to be composed mostly of molten metal<br />The outer core stops on kinds of seismic ways and slows down another because it is liquid. <br />
  7. 7. Outer Core<br />Outer Core<br />
  8. 8. Mantle<br />The mantle is above the outer core<br />It is the largest layer in the Earth’s interior, it makes up about 67% percent. <br />Even though the mantle is solid, it flows slowly, similar to putty.<br />The mantle has two parts: the asthenosphere-the lower mantle, and the lithosphere- the upper mantle<br />The lithosphere is composed of crust and the asthenosphere is composed of a plastic-like layer upon which the plates of the lithosphere float and move <br />
  9. 9. Mantle<br />
  10. 10. Crust<br />The crust is the outermost layer<br />It is the thinnest layer of the Earth<br />The thickness varies; the crust under an ocean is thinner than the crust under the continents<br />All Earth’s features are part of the crust <br />
  11. 11. Crust<br />
  12. 12. Distribution of Earth’s Mass<br />

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