Once In a Mega-Moon

This Once In a Mega-Moon activity & project also includes:

When the moon is waxing and you are in the middle of a lunar unit, assign this activity as extra credit. Observers mark the apparent diameter of the moon on a card when it is low in the sky, and then again a few hours later when it is up high. Did it actually shrink?

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Additional Tags


  • An excellent observation activity for those who are particularly interested in the night sky

  • Not all of your learners will be able to do this activity at home