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Phases of the Moon Page 67 Why does the moon appear to shine?

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Presentation on theme: "Phases of the Moon Page 67 Why does the moon appear to shine?"— Presentation transcript:

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2 Phases of the Moon Page 67

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4 Why does the moon appear to shine?

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9 It is reflecting light from the sun. Only the side of the moon facing the sun lights up! Half of the moon is always lit up. We don’t always see the side that is lit!

10 Why do we always see the same face/side of the moon? (“the man on the moon”) The moon completes one rotation (spin) in the same time it takes to revolve around the Earth.

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14 The Moon’s orbit is a slightly tipped Ellipse (compared to the orbit of Earth around the sun.) What is the orbit of the moon like?

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16 What is a moon phase? Visible portion of the moon as seen from Earth.

17 How long does it take for the moon to go through all of it’s phases? 29.5 days, or about a month! Tip-think of it as a moonth!

18 1.New Moon 2.Waxing Crescent 3.First Quarter 4.Waxing Gibbous 5.Full Moon 6.Waning Gibbous 7.Third Quarter 8.Waning Crescent Waxing: Waning: Lit portion is increasing in size. Lit portion is decreasing in size.

19 DreamWorX= WaXing

20 “Crescent”

21 Try it! Try to draw a model of where the moon would need to be, relative to the Sun and Earth, in order to see each phase:

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23 Phases of the Moon Sunlight (1) New Moon (2) Waxing Crescent (3) First Quarter (4) Waxing Gibbous (5) Full Moon (6) Waning Gibbous (7) Third Quarter (8) Waning Crescent Earth The general locations and orientations for the phases of the moon. Earth spins on its axis in the same direction as the moon’s orbit.

24 Sunlight Earth (1) New Moon How much of the moon’s face does the person see? What time of day is it for the observer? Noon!! NEW MOON Wherever the person looks all they see is shadowed moon. Perspective & The Moon’s Face

25 Sunlight Earth (2) Waxing Crescent How much of the moon’s face does the person see? What time of day is it for the observer? 3PM!! WAXING CRESCENT When you look up you see only a small crescent brightly lit. (Right Side)

26 Perspective & The Moon’s Face Sunlight Earth (3) First Quarter How much of the moon’s face does the person see? What time of day is it for the observer? Sunset - 6PM!! FIRST QUARTER When you look up you see one half of the front face of the Moon brightly lit. (Right side)

27 Perspective & The Moon’s Face Sunlight Earth (4) Waxing Gibbous How much of the moon’s face does the person see? What time of day is it for the observer? 9PM!! WAXING GIBBOUS When you look up you see only a small crescent, darkly shadowed, on the left.

28 Perspective & The Moon’s Face Sunlight Earth (5) Full Moon How much of the moon’s face does the person see? What time of day is it for the observer? Midnight-12AM!! FULL MOON When you look up you see the entire face of the Moon brightly lit.

29 Perspective & The Moon’s Face Sunlight Earth (6) Waning Gibbous How much of the moon’s face does the person see? What time of day is it for the observer? 3AM!! WANING GIBBOUS When you look up you see only a small crescent, darkly shadowed, on the right.

30 Perspective & The Moon’s Face Sunlight Earth (7) Third Quarter How much of the moon’s face does the person see? THIRD QUARTER When you look up you see one half of the front face of the Moon brightly lit. (Left side) What time of day is it for the observer? Sunrise - 6AM!!

31 Perspective & The Moon’s Face Sunlight Earth (8) Waning Crescent How much of the moon’s face does the person see? WANING CRESCENT When you look up you see only a small crescent brightly lit. (Left Side) What time of day is it for the observer? 9AM!!

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