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Learners follow a three-step process to start their own rock collection.

In this activity, two groups of learners create two separate landform models out of clay (mountains and valleys).

Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.

In this activity (page 1 of the PDF under SciGirls Activity: Dinosaurs), learners will model how paleontologists estimate the age of fossil discoveries by extracting “fossil” playing cards from newspa

In this activity (page 2 of PDF under GPS: Cave Swallows Activity), learners will model how caves are formed by placing one piece of chalk in a cup of vinegar and another piece in a cup of water, then

In this activity, learners model how the Moon's volcanic period reshaped its earlier features.