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Agenda

Explore the fascinating phenomena of the moon's rotation, eclipses, and tides. Learn about the lunar and solar eclipses, the phases of the moon, and the gravitational forces that cause tides. Discover how these events shape our understanding of the celestial world.

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Agenda

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Presentation Transcript

  1. Agenda • Does the moon rotate? • Eclipses • Tides

  2. Mid-term check inOn a notecard… • What is helping you learn the most in this class? • What is helping you learn the least? • What one thing would you change about this class?

  3. The same side of the moon always faces us. Therefore • The moon does not rotate on its axis • The moon does rotate on its axis

  4. If you lived here… How often would the Sun rise? How often would the Earth rise? How often would you see stars?

  5. If you lived here… • How long would a day last? • How long would a night last?

  6. Solar and lunar eclipses

  7. Solar eclipse

  8. Types of solar eclipses NASA Total solar eclipse

  9. Types of solar eclipses NASA Annular eclipse

  10. Total solar eclipse

  11. Annular solar eclipse

  12. Lunar eclipse

  13. Lunar eclipse

  14. Why don’t eclipses occur every month?

  15. Size and distance to scale! Moon Earth Actual tilt of the Moon’s orbit line to the Sun

  16. What causes tides?

  17. To moon The moon’s gravity distorts the oceans. Tides occur twice a day!

  18. Low tide

  19. High tide

  20. What about the Sun? Spring tide Sun, moon in a line Neap tide Sun, moon at right angles

  21. New or full ¼ or ¾ Waxing Waning Can be any phase What is the phase of the moon on this day? Spring tide Sun, moon in a line

  22. Of course, the Earth is not all water • Land masses stop water flow • Friction between oceans and floor • Depth of ocean varies • The Earth rotates

  23. Not all surf is created equal

  24. Summary • Lunar eclipses: Sun-Earth-Moon • Solar eclipses: Sun-Moon-Earth • Phases of the moon • From above the solar system, looking south

  25. What is a haiku? • 3 line poem: • Line 1 – 5 syllables • Line 2 – 7 syllables • Line 3 – 5 syllables • Does not have to rhyme

  26. On a note cardwrite 3 haikus Eclipses Tides Gravity 5 7 5

  27. More on phases of the moon

  28. The moon is overhead at 3 am It rose around 9 pm It will set around 9 am Example: how does this look from above the solar system?

  29. E W It’s 3 a.m. The moon is overhead

  30. E W Rose at 9 pm

  31. It rose around 9 pm How does this look outside?

  32. Example What time is it? How does the moon look?

  33. It will set around 9 am How does this look outside?

  34. One month…

  35. More on tides… • Largest tidal range: 50 ft (East coast of Canada) • Typical range: 5-10 ft • Moon’s tidal strength is about 2 times that of the Sun • These forces actually cause the Earth and Moon to change shape!

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