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Measurement  
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Using the diameter of a pencil as a baseline, students calculate relative heights of several altitudinal points (top of Earth's atmosphere, the beginning of space, commercial airplane cruising altitude, and orbit of the Hubble Space Telescope) and... (View More)

This is an activity about the relative sizes of the Earth and the Moon and the distance between them. Learners will inflate a balloon to the approximate size of the moon in relation to a standard globe. They will then hypothesize as to the correct... (View More)

Audience: Elementary school, Middle school
Materials Cost: Free
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