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In this activity, learners are challenged to design and construct a jointed figure that moves in a motion (something like jumping jacks) when a string is pulled.

An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.

This multi-part activity from the National Parks Service blends the science of plate tectonics with the culture and history of places with dramatic geologic landscapes.

In this activity, learners conduct an experiment to investigate the effect of elevated levels on CO2 on plant growth.