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Lesson 3: How Do Earth and Its Moon Move? - PowerPoint PPT Presentation


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Lesson 3: How Do Earth and Its Moon Move?. By: Mr. Leslie’s Class. Definitions. While orbiting the Sun, Earth also turns on an imaginary line called an axis With each rotation, or turn, on Earth’s axis, there is one period of daylight and one period of night. Earth’s Revolution. Question???.

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Presentation Transcript
definitions
Definitions
  • While orbiting the Sun, Earth also turns on an imaginary line called an axis
  • With each rotation, or turn, on Earth’s axis, there is one period of daylight and one period of night.
question
Question???
  • What causes summer days to be long and warm?
    • The sunlight hits Earth’s surface more directly.
    • We live in the Northern hemisphere. Which picture shows summer on Earth for the northern hemisphere?

Summer for Winter for

Northern hemisphere Northern hemisphere

moon phases
Moon Phases
  • Lunar eclipse – occurs when the Moon passes into Earth’s shadow.
  • Next Lunar eclipse – December 21, 2010
moon phases1
Moon Phases
  • Solar eclipse – occurs when the moon passes in front of the Earth to block sunlight from reaching Earth.
  • Next Solar eclipse – June 1, 2011
definition
Definition
  • Revolution – orbits, or trip, around the Sun.
    • Earth takes 365.25 days to revolve around the Sun.
    • The moon orbits/revolves the Earth
  • Rotation – The amount of time it takes to for one day to happen.
    • Earth takes 23 hours and 56 minutes to rotate once.
rotation and revolution
Rotation and Revolution

Inner Planet Revolution

question1
Question???
  • What causes planets to have days that are longer or shorter than a day on Earth?
    • Each planet rotates at a different speed, so it takes more or fewer hours to rotate once.
main idea
Main Idea
  • The movement of Earth and Moon cause changes in seasons, daylight hours, the phases of the moon, and the night sky.