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Scale Model of Sun and Earth
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In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.
Size, Mass, Area, and Volume
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In this activity (page 23 of PDF), learners conduct an experiment to determine how the size and mass of a projectile affects the area and the volume of an impact crater.
Eclipse: How can the little Moon hide the giant Sun?
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In this activity, learners explore how distance can affect the way we perceive the size of an object.