Earth in Space

1
Earth in Space

• Rotation - spinning on its axis
• Revolution - moving around the sun
• A Day - one complete rotation (not 24 hrs)
• A Year - one complete revolution (not 365.25
  days)
• From the North Pole, the Earth rotates revolves
  counterclockwise
• 24 hours, 60 minutes, and 60 seconds - these
  periods of time are made up they have nothing to
  do with anything.
• The Earth rotates 365.25 times in its orbit
  around the sun. This is an astronomical fact.

2

• The Earth is tilted 23 1/2 degrees
• Because the Earth is tilted, the length of day
  and night change
• Long days, short nights
  Short days, long nights
• Arctic Circle and Antarctic Circle
• Tropic of Cancer and Tropic of Capricorn

3

• The Earth spins 365.25 times before it makes one
  revolution
• Using the Earths axis, there are four special
  days throughout the year Summer Solstice, Fall
  Equinox, Winter Solstice, and Spring Equinox