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