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In this activity (on page 1 of the PDF), learners make a "mini-globe" to investigate the causes of day and night on our planet.

In this activity, learners model the gravitational fields of planets on a flexible surface.

In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

In this hands-on activity, learners will become familiar with the special adaptations of rainforest plants and discover the conditions needed for tropical trees to survive along with what can impinge

In this activity, learners work in teams to construct human lung models from small plastic beverage bottles and balloons.