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In this activity, learners explore the human influences on the carbon cycle and examine how fossil fuels release carbon.

In this physics activity, learners build their own rockets out of film canisters and construction paper.

In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

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