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In this activity, learners turn empty 2-liter bottles into a see-through compost container.

In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

Through discussion and hands-on experimentation, learners examine the geological (ancient) carbon cycle.

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 with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.

Just like birds, some dinosaurs had air-filled (pneumatic) bones, which made the dinosaurs' skeletons lighter.

This activity features two connected hands-on activities about dinosaur bones.