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In this activity, learners discover how geologists use stratigraphy, the study of layered rock, to understand the sequence of geological events.

In this activity, learners construct their own small catapults using simple materials. Learners follow visual instructions to build their launching device.

Role-playing the parts of chromosomes and centrioles, learners use large chromosome models and nylon cords (spindle fibers and cell membranes) to walk through the processes of mitosis and meiosis.

In this activity on page 3 of the PDF, learners visualize the relative size and structural differences between microbes that have the potential to cause disease.

In this activity, learners work in teams build and launch rubberband-powered foam rockets.

Learners follow directions to construct a water-powered electrical generator using a turbine made from plastic spoons.