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Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size.

In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

In this activity, learners investigate the concepts of relative size and distance by creating a basic model of the solar system.

Learners investigate why the Sun and Moon appear the same size in the sky even though the Sun is over 400 times larger in diameter.