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Learners investigate weight by building a spring scale. They observe and record how it responds to objects with different masses.

Learners build a pendulum from a yo-yo, and then design their own experiment to determine what affects the pendulum's period of swing.

Learners examine collisions between two skateboards carrying different masses. They learn about conservation of momentum in collisions.

Learners build at least two different spinners (tops) to investigate how mass distribution, size, and shape affect the length of time the spinner spins.

In this activity, learners build their own construction cranes using tongue depressors and pushpins.