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The "Rocket Reactions" activity is an exciting way to learn about how materials interact, behave, and change.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

In this activity, learners make film canister rocket ships. A fin pattern is glued onto the outside of the canister, and fuel (water and half an antacid tablet) is mixed inside the canister.

Our bodies defend themselves in many different ways to prevent us from getting sick.