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In this activity, learners make "solar cookies," edible models of the Sun's outer layers using sugar cookies and toppings.

This demonstration activity models how Venus appears from Earth.

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

This interactive demonstration reintroduces learners to three states of matter (solid, liquid, gas), and introduces them to a fourth state of matter, plasma.

In this activity, learners explore how distance can affect the way we perceive the size of an object.