You can teach kids about the different phases of the moon by first making this Oreo Cookie moon phase model from Thats So Cuegly.
Next, explain the different phases with this explination from Kids Astronomy.
Each month our Moon passes through eight phases. These phases are named after how much of the moon we can see, and whether the amount visible is increasing, or decreasing each day.
It takes our Moon about 29.5 days to completely cycle through all eight phases. Occasionally (about every 2.7 years) there are two Full Moons in the same month. This is referred to as a Blue Moon. Hence the saying “Once in a Blue Moon”.
The side of the moon facing the Earth is not illuminated. Additionally, the moon is up through out the day, and down through out the night. For these reasons we can not see the moon during this phase.
During this phase, part of the Moon is beginning to show. This lunar sliver can be seen each evening for a few minutes just after sunset. We say that the Moon is “waxing” because each night a little bit more is visible for a little bit longer.
During first quarter, 1/2 of the moon is visible for the first half of the evening, and then goes down, leaving the sky very dark.
When most of the Moon is visible we say it is a Gibbous Moon. Observers can see all but a little sliver of the moon. During this phase, the Moon remains in the sky most of the night.
When we can observe the entire face of the moon, we call it a Full Moon. A full moon will rise just as the evening begins, and will set about the time morning is ushered in.
Like the Waxing Gibbous Moon, during this phase, we can see all but a sliver of the Moon. The difference is that instead of seeing more of the Moon each night, we begin to see less and less of the Moon each night. This is what the word “waning” means.
During a Last Quarter Moon we can see exactly 1/2 of the Moon’s lighted surface.
Finally, during a Waning Crescent Moon, observers on Earth can only see a small sliver of the Moon, and only just before morning. Each night less of the Moon is visible for less time.
Lastly, the moment the kids have been waiting for, go ahead…grab the milk!
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