Standard Indicater #1
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Standard Indicater #1






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Standard Indicater #1 Presentation Transcript

  • 1. Earth’s Rotation Abby Baker 9/16/2009
  • 2. Standard 3
    • Indicator 4.3.8 – Explain that the rotation of the Earth on its axis every 24-hours produces the night-and-day cycle.
    • Taken from:
    • Link to activity:
  • 3. Definitions
    • Rotation – the movement or path of the earth or a heavenly body turning on its axis
    • Tilt – to cause to lean, incline, slope, or slant
    • Taken from :
  • 4. Pre-Activity
    • Show the students a pencil, and tell them that it will represent the Earth’s axis. Wrap foil around the pencil in a ball and explain that the foil will represent Earth.
    • Select a student(s) to tilt and rotate the pencil, demonstrating how the Earth moves.
    • Tell the students they will be modeling the process of day and night. Ask these questions:
      • How long is a full day?
      • What causes the night-and-day cycle?
  • 5. Class Activity
    • Show the students the globe and tell them it represents the earth. Help them identify the axis. (You can use a flashlight to represent the sun’s rays.)
    • Identify our continent, country, city, and state on the globe.
    • Turn the lights off and shine the flashlight on the piece of paper on the globe.
    • Ask students: “Is there light shining on out city/state right now?”
      • “ What do you think will happen as I rotate the globe on it’s axis?” (slowly rotate the globe while holding the flashlight in the same spot)
  • 6. Activity Continued
    • Stop the globe when it is rotated halfway. Ask the students:
      • “Now is there light shining on our city/state?”
      • Is the other side of the globe in the light or the dark?”
      • Discuss with the students that it takes 12 hours for the Earth to rotate halfway and it takes 24 hours for a full rotation.
  • 7.  
  • 8. Follow-Up Questions
    • How many hours are there in one day?
    • If it is day/night in our city/state, is it daytime or nighttime in Australia? (have the students show how they know that with the globe)
    • How long does it take Earth to rotate on its axis? (How long does it take Earth to rotate halfway?)
  • 9. References