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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, learners create channel features with flowing water, comparing their observations to real images of Mars and Earth taken by satellites/orbiters.

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

Learners model the processes that formed some of Earth's largest mountain ranges: the Himalayas, the Andes, and the Alps.

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 drop impactors onto layers of graham crackers!

In this activity, learners model erosion using a clear shoebox and sand or soil.

In this activity, learners create volcanoes like those they have examined on Earth and Mars through images taken by spacecraft.

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

In this activity, pairs of learners model how scientists use craters to determine the ages of lunar surfaces. One partner keeps time while the other creates a painting for the other to interpret.

In this activity (on pages 6-11), learners work as a team to investigate how impact craters on Earth, the Moon or other planets take shape and what patterns they make.

In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take.

"Exploring the Solar System: Craters" is an active, hands-on activity that demonstrates how craters form, and what they can teach us about the history and composition of planets and moons.

In this activity, learners examine photo images of Earth taken from space, and attempt to identify and explain some of our planet's geological features.

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, learners try to figure out who has their matching rock type by reading a description of their rock (no talking!).

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