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Positions of the Sun and Moon affect the Earth

Explore the patterns of lit and unlit portions of the Moon as seen from Earth and the changes that occur during its 29-day cycle. Discover the different phases, from the new moon to the full moon, and learn how to illustrate and describe them accurately.

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Positions of the Sun and Moon affect the Earth

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  1. Positions of the Sun and Moon affect the Earth Lunar Phases: Patterns of lit and unlit portions of the Moon as you see it from Earth. The cycle takes about ….. 29 days.

  2. Changes in the Moon…. • Waxing: means growing • Between new moon and full moon • Waning: means shrinking • Between full moon and new moon

  3. New Moon • Week 1 • Appears to be no moon. • Moon is between the sun and the earth.

  4. Waxing Crescent • Week 1 • Amount of sunlight increases on near side. • waxing. • Right side lit

  5. First Quarter Moon • Week 2 • Half of the near side lit; Moon is 90° (right angle) from the sun. • waxing • Right side lit

  6. Waxing Gibbous • Week 2 • Near side is more than half lit, but not fully lit. • waxing • Right side lit

  7. Full Moon • Week 3 • Half way through the cycle. • Whole near side of the Moon is lit. • The Moon and Sun on opposite sides of the Earth.

  8. Waning Gibbous Moon • Week 3 • Less of near side lit; seems to be shrinking • waning • Left side lit

  9. Third Quarter Moon • Week 4 • Near side half lit • Three-quarters through cycle • waning • Left side lit

  10. Waning Crescent Moon • Week 4 • Less than ½ of the Moon is lit • Crescent gets thinner • waning • Left side lit

  11. Gibbous: Describes shape • Between first quarter and full moon • Between full moon and third quarter • Crescent: describes shape • Between new moon and first quarter • Between third quarter and new moon

  12. Plan for the Day • Investigating Moon Phases – demonstration and guided notes • Moon riddles – group work • Can you Draw it? – practice with Moon phases • Exit Ticket Goal: I can describe and illustrate the phases of the Moon.

  13. Group Work

  14. What is the term we use to describe when the Moon is growing? • What phase comes between waxing gibbous and waning gibbous? • When the Moon is lit on the right side and appears as a sliver, what phase is it in? • According to this calendar, when was the last new moon? Bonus: Can you name all 8 stages in order? (starting with new moon)

  15. Plan for the Day • Investigating Moon Phases – demonstration and guided notes • Moon riddles – group work • Can you Draw it? – practice with Moon phases • Exit Ticket Goal: I can describe and illustrate the phases of the Moon.

  16. The Moon Phases • New Moon: • the Moon is between earth and sun, no Moon is visible • Full Moon: • the Moon and sun on opposite sides of earth • Waning: shrinking • Waxing: growing

  17. The Moon Phases • In the table… • Draw and label each phase as it appears from earth (starting with the new moon). • On the diagram.... • Notice the new moon is labeled and shaded for you. • Label the general location/direction of the sun (not included on diagram). • Label the earth. • Shade each of the moons as they appear from space . (Clue: Think about where the sun is. This will not be the same as the moons in the table.) • Label each of the moon phases. • Draw a dotted line through each moon showing what part of the moon is visible from earth. • Draw a triangle next to the phases that are waxing. • Draw a square next to the phases that are waning.

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