An Exploration of the Lunar Cycle
An Exploration of the Lunar Cycle
PowerPoint Guide
1. Rotation is when a planet or moon turns all the way around or spins on its axis one time.
2. Revolution is when a planet or moon travels once around an object.
3. On Earth rotation takes just 1 day(s) to spin about its axis.
4. Earth Rotates around its axis causing some parts to be exposed and others to be left in the shadows, this is the cause of day and night.
5. The Moon also rotates about its own axis; the time it takes for the moon to rotate around its axis is about 27.3 day(s).
6. The Earth takes about one Year to revolve around the sun changing the Seasons of the year.
7. The seasons on Earth are dependent on the axis tilt of the planet and its position away from the sun. When Earth’s tilt is neither away nor towards the sun but is vertical it is called Equinox .
8. When the Earth’s tilt is away or towards the Sun, it is called Solstice .
9. True or False: The Moon changes shape, that’s why we see different shapes in the night sky.
10. New Moon occurs when the Moon is positioned between the Earth and the Sun.
11. First and Last Moon’s occur when the Moon is at a 90 degree angle with respect to the Earth and Sun.
12. At a Full Moon the Earth, Moon, and Sun are in alignment. The entire sunlit part of the Moon is facing us and the shadowed portion is hidden from view.
13. After the New Moon, the sunlit portion is increasing, but less than half, so it is called a waxing crescent.
14. Following the last quarter is the waning crescent which wanes until the light is completely gone.
15. After the first quarter, the sunlit portion is still increasing, but now is more than half illuminated, so it is called a waxing gibbous .
16. After the full moon, the light continually decreased and the waning gibbous phase occurs.
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