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In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

In this activity, learners construct and launch rockets using simple materials and their understanding of chemical reactions.

Learners will build and experiment with their own windmills made from simple household materials.

In this activity, learners use rice grains to model the composition of the atmosphere of the Earth today and in 1880. Learners assemble the model while measuring percentages.

Learners observe two model atmospheres -- one with normal atmospheric composition and another with an elevated concentration of carbon dioxide.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

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.