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

3
(No Transcript)
4
(No Transcript)
5
(No Transcript)
6
(No Transcript)
7
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

8
(No Transcript)