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

Learners will compare the growth rate and appearance of crystals forming on small rocks to those growing on miscellaneous objects. Learners will also investigate how temperature (warm vs.

In this activity (on pages 12-15), learners make a crater model and test the effects of weather (rain) on its surface.

In "Exploring the Solar System: Mars Rovers," participants learn about how scientists and engineers use robotic rovers and other vehicles to explore distant worlds, and experience some of the challeng

In this activity, learners will model the mechanical weathering and erosion of rocks in a stream or river.

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 take core samples of candy bars with a straw and carefully observe & excavate their sample, modeled after what the NASA Perseverance rover will do on Mars.

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