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Tuesday, March 19 Warm-Up

Tuesday, March 19 Warm-Up. Full moon – the whole (1/2) side of the moon is visible. New moon – dark because sunlight is not reflected. Compare a full moon and a new moon. MYP Unit Question : What’s out there? Area of Interaction : Human Ingenuity Learner Profile : Risk Taker

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Tuesday, March 19 Warm-Up

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  1. Tuesday, March 19 Warm-Up Full moon – the whole (1/2) side of the moon is visible. New moon – dark because sunlight is not reflected. Compare a full moon and a new moon.

  2. MYP Unit Question: What’s out there? Area of Interaction: Human Ingenuity Learner Profile: Risk Taker Standard: Explore current scientific views of the universe and how those views evolved. .

  3. Learning Target: Today I’m learning about eclipses because it is a unique phenomenon. Opening: Moon & Sun Simulation Work Session: Eclipse Explanation Video Notes – Eclipses Closing

  4. On your paper, makethe following chart: (you will need most of the page). What is an eclipse? Solar Eclipse Lunar Eclipse Draw the image Draw the image What celestial object What celestial object Is blocked? Is blocked? What’s the penumbra? What’s the umbra?

  5. Eclipses • Occurs when the shadow of one celestial body falls on another • Two types: - Solar - Lunar

  6. Solar Eclipse • Moon passes directly between the Earth and the Sun • New Moon blocks the sun. Draw and label this image . http://www.hermit.org/eclipse/why_solar.html

  7. Total Solar Eclipse • Umbra – sees a total eclipse; darkest part • Penumbra – sees a partial eclipse

  8. Danger! The corona is visible here.

  9. This is a photo taken from the former Soviet space station MIR. It shows the shadow of the Moon falling on the Earth in 1999. Anyone under the shadow saw a solar eclipse. Solar Eclipse

  10. History Trivia Chinese astrologers wrote of an eclipse occurring over 4000 years ago. Historians and astronomers believe that this was an eclipse that happened on 22 October 2134 B.C. Two astrologers at the time, Hsi and Ho, had apparently failed to predict this eclipse, and so were beheaded.

  11. "Nothing can be sworn impossible since Zeus made night during mid-day, hiding the light of the shining Sun." - Archilochus 648 BC

  12. Next eclipse

  13. Why don’t we see an eclipse every month? The reason is that the moon’s orbit around Earth is tilted—by about 5°—relative to the orbit of Earth around the sun. This tilt is enough to place the moon out of Earth’s shadow for most full moons and Earth out of the moon’s shadow for most new moons. All 3 must be on the same geometrical plane.

  14. Lunar Eclipse • Occurs when the Earth comes between the sun and the moon • Full moon is blocked by the Earth. Lunar Eclipse Simulation Lunar Eclipse

  15. Draw and label this image .

  16. Lunar Eclipse Sequence Passing into the shadow Totality Coming out of the shadow

  17. Why is the Moon red during an eclipse? • The Earth’s atmosphere filters some sunlight and allows it to reach the Moon’s surface. • The blue light is removed—scattered down to make a blue sky over those in daytime. • Remaining light is red or orange. • Some of this remaining light is bent or refracted so that a small fraction of it reaches the Moon. • Exact appearance depends on dust and clouds in the Earth’s atmosphere.

  18. Upcoming Lunar Eclipses • Apr. 25, 2013, Partial eclipse (not visible in US) • May 25, 2013, Penumbral eclipse • Oct. 18, 2013, Penumbral eclipse • Apr 15, 2014, TOTAL ECLIPSE (visible here)

  19. Closing: Begin homework

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