Sect 9.2

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Sect 9.2

  1. 1. 6 th Grade Science Chapter 9 Sun-Earth-Moon System Notes Section 9.2
  2. 2. <ul><li>If the Moon rotates on its axis why can’t we see the back side of the moon? </li></ul><ul><li>The moon takes 29.5 days to make one rotation on its axis. The moon takes 29.5 days to make one revolution around the Earth. </li></ul><ul><li>What is the Moon’s most obvious effect on Earth? </li></ul><ul><li>The Moon’s most obvious effect on Earth is the ocean tides. </li></ul>Key Questions 1 The Tadpole Galaxy
  3. 4. Synchronous rotation of the moon
  4. 5. The far hemisphere was first photographed by the Soviet Luna 3 probe in 1959, and was first directly observed by human eyes when the Apollo 8 mission orbited the Moon in 1968.
  5. 7. Bay of Fundy - Canada
  6. 8. <ul><li>What is a new Moon? </li></ul><ul><li>A new Moon is when the Moon is between the Earth and the Sun. The Moon is dark and rises and sets with the Sun. </li></ul><ul><li>What is a full Moon? </li></ul><ul><li>A full Moon is when the Earth is between the Moon and the Sun. The Moon is completely bright and rises when the Sun sets. </li></ul>Key Questions 2 The Sombrero Galaxy
  7. 10. Full Moon Rising
  8. 11. <ul><li>What are the phases of the Moon? </li></ul><ul><li>New, Waxing crescent, 1 st quarter, Waxing gibbous, Full, Waning gibbous, 3 rd quarter, Waning crescent. </li></ul><ul><li>What causes an eclipse to occur? </li></ul><ul><li>Eclipses occur when Earth or the Moon temporarily blocks the sunlight from reaching the other- Solar Eclipse and Lunar Eclipse. </li></ul>Key Questions 3
  9. 16. <ul><li>What is an umbra and prenumbra? </li></ul><ul><li>The umbra is the darkest part of the moon’s shadow. The prenumbra is a lighter part of the moon’s shadow. </li></ul><ul><li>What are the Moon’s surface features? </li></ul><ul><li>The Moon has craters from impacts with meteorites. It also has dark, flat regions called maria formed from igneous rock. </li></ul>Key Questions 4
  10. 19. Project Apollo
  11. 20. <ul><li>Explain how the Sun, Moon, and Earth are positioned relative to each other during a new moon and how this alignment changes to produce a full moon. </li></ul><ul><li>Describe what phase the Moon must be in to have a lunar eclipse. A solar eclipse. </li></ul><ul><li>Define the terms umbra and penumbra and explain how they relate to eclipses. </li></ul><ul><li>Explain why lunar eclipses are more common than solar eclipses and why so few people ever have a chance to view a total solar eclipse. </li></ul><ul><li>What do the surface features and their distribution on the Moon’s surface tell you about its history? </li></ul>Questions Section 9.2
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