Unit 1: Planet Earth - PowerPoint PPT Presentation

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Unit 1: Planet Earth

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Earth s Shape What is the Shape of the Earth? Nearly Perfect Sphere Evidence: Photo s, Sailing Ships Mast, Path of sun and other celestial objects in the sky seen ... – PowerPoint PPT presentation

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Title: Unit 1: Planet Earth


1
Unit 1 Planet Earth
  • Earths Shape

2
What is the Shape of the Earth?
  • Nearly Perfect Sphere
  • Evidence
  • Photos,
  • Sailing Ships Mast,
  • Path of sun and other celestial objects in the
    sky seen from different locations at the same
    time,
  • Earths shadow on the moon during a lunar
    eclipse,
  • force of gravity is nearly equal everywhere on
    Earths surface

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True Shape of the Earth
  • Oblate Spheroid
  • Distance around the poles is less (40,008km) than
    the distance around the equator (40,076km)
  • Earth is perfectly smooth as well compared to its
    size...like a billard ball

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