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Why Does the Moon Have Phases?
Source Institutions
In this activity, learners use a simple 3D model to discover why the Moon has phases.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-519.jpg?itok=DRK1gCWE)
Scale Model of Sun and Earth
Source Institutions
In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.
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The Thousand-Yard Model
Source Institutions
This is a classic exercise for visualizing the scale of the Solar System.
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Eclipse: How can the little Moon hide the giant Sun?
Source Institutions
In this activity, learners explore how distance can affect the way we perceive the size of an object.