# The Moon How is the moons motion around

The Moon How is the moons motion around the Earth observed? Check what you know: Does the Moon orbit the Earth? The Earth takes a year to orbit around the Sun. What about the Moon? Does it orbit the Earth? Circle the answer you think best describes the motion of the Moon.

A. The Moon orbits the Earth about once a day. B. The Moon orbits the Earth about once a week. C. The Moon orbits the Earth about once a month. D. The Moon orbits the Earth about once a year. E. The Moon does not orbit the Earth. Uncovering Student Ideas in Astronomy pg 99 INTRODUCTION It takes 29.5 days for

the Moon to revolve around the Earth and we always see that same side of the moon. (we never see the back side) Why do we have MOON PHASES? Different amounts of sunlight light up the moon and, from Earth, makes the moon appear to

have different shapes or phases. Check what you know: Seeing the Moon How often have you looked up into the sky and seen the Moon? Put an X next to all the times when you think you can go outside and see the Moon. ____ in the morning ____ at noon ____ in the middle of the afternoon

____ in the evening before sunset ____ in the evening after sunset ____ at midnight What do we see? The Phases of the Moon New moon (0% No reflected light) Crescent (1-49% partly but less than onehalf illuminated by direct sunlight.) Quarter (50%)

Gibbous (51-99% more than one-half but not fully illuminated by direct sunlight. ) Full moon (100% illuminated by direct sunlight.) Phases of the Moon 1. New Moon - earth cannot see any part of the moon (lasts one day) 2. Waxing Crescent - waxing means moons face is growing (lasts several days) 3. First quarter - right half of moons face is visible (lasts for only one day) 4. Waxing gibbous - more than 1/2 of moons face is visible (lasts several days)

5. Full moon all of the moons face is visible (last for one day) 6. Waning gibbous - (last for several days) 7. Last quarter or Third quarter - left half of face is visible (lasts for only one day) 8. Waning crescent - waxing means moons face is shrinking (last for several days) Why all the crazy words for the moon phases? Most of these words are based in Latin or Greek (those dudes way back when that started doing science and observing space!)

CRESCENT- like the shape, curve. GIBBOUS- think bulging for those two bs in the middle of the word. This shape is bigger than half, but less than full. WAXING- Think Wax On from Karate Kid. It means getting bigger. Light is being added and the moon is looking bigger each day. WANING- It means getting smaller. Since we say Way-ning. I think of it as going AWAY. Moon appears to be shrinking each day. As the moon

moves (revolves) around the Earth, it looks like it has different shapes. The shape of the moon does not really change. It just changes its location

in space.

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