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Learners construct and launch paper helicopters.

Using simple, inexpensive items, learners build and test submarine models.

In this design challenge activity, learners modify a cup so it can carry a marble down a zip line and also drop it onto a target.

Learners build simple catapults and use them to launch cotton balls.

In this activity, learners determine whether thermal energy can be used for work.

In this activity (pages 42-49), learners discover the methods and challenges of building nanoscale structures with macroscale equipment.

In this activity, learners explore the concept of friction and how ball bearings reduce friction.

In this activity, learners make an electromagnet motor to demonstrate the most basic method of changing electrical energy into mechanical energy.

In this activity, learners model directed evolution by making paper fly. Learners construct and fly paper airplanes.