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February 11, 2013 Q2-Pg.

Science Starter: What is the difference between revolution and rotation? Make a hypothesis about what the streaks are in this picture. What kind of wave is a sound wave?. February 11, 2013 Q2-Pg. Daily Goal : We will model solar and lunar eclipses.

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February 11, 2013 Q2-Pg.

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  1. Science Starter: • What is the difference between revolution and rotation? • Make a hypothesis about what the streaks are in this picture. • What kind of wave is a sound wave? February 11, 2013 Q2-Pg. Daily Goal: We will model solar and lunar eclipses. Homework: Read your New York Times article and answer the questions.

  2. Phases of the Moon What is this phase? During what phases are the Moon, Earth and sun aligned in a straight line? What is this phase?

  3. WHAT DO WE KNOW ABOUT ECLIPSES?Let’s assess our prior knowledge.

  4. Eclipses • Eclipses happen when: • Moon’s shadow hits Earth or • Earth’s shadow hits Moon • An eclipsehappens because either the Earth or the Moon is blocking the sun, and it casts shadow. • Eclipse = a shadow

  5. Are all eclipses the same? • There are 2 kinds of eclipses: • Solar eclipses • Lunar eclipses What does solarmean again? What does lunarmean? solar lunar

  6. What is a solar eclipse? • Solar eclipse - occurs when the Moon passes directly between the Earth and sun, blocking light from the sun sun Moon

  7. Solar eclipseshappen during which phase? • Solar eclipses happen during the new Moon phase.

  8. Let’s watch! May 20, 2012

  9. What is a lunar eclipse? • Lunar eclipse - occurs when the earth passes directly between the sun and the Moon. The Moon is in the Earth’s shadow. Moon Earth’s shadow

  10. Lunar eclipseshappen during which phase? • Lunar eclipses happen during the full Moon phase.

  11. Let’s watch! Lunar Eclipse

  12. Eclipses • Umbra – darkest part of the Moon’s shadow, cone shaped • Penumbra – larger part of Moon’s shadow that is not as dark

  13. Partial and Total Eclipses

  14. Solar or Lunar Eclipse? Solar Lunar

  15. Solar or Lunar Eclipse? Solar Lunar

  16. Critical Thinking! • We have a new Moon every month. Solar eclipses happen during the new Moon phase. Why don’t we have solar eclipses every month? • Generate a hypothesis.

  17. Just like the Earth’s axis, the Moon’s orbit is tilted. Most times, the Moon is a little bit above or a little bit below the shadow. An eclipse can only occur when the Sun, the Earth and the Moon are directly aligned.

  18. Let’s model it! • In your table groups, you have 45 seconds to choose one person to be: • The Sun • The Moon • The Earth • The CEO (the CEO will organize the group and double check that everyone is where they should be.) • In groups of 3, the Sun will also be the CEO.

  19. Not yet, but when I say go: • Arrange yourselves like a total solar eclipse. • Move to make yourselves a partial solar eclipse. • Arrange yourselves like a total lunar eclipse.

  20. Complete your worksheet as an exit ticket. • If you finish early, color: • The Earth blue • The Moon white • The Penumbra gray • The Sun yellow • The Umbra black

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