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

In this activity, learners participate in a scavenger hunt, searching for and recognizing minerals and products that contain minerals.

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

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