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In this activity (on page 2 of PDF under GPS: Roller Coaster Design Activity), learners will use food cans of many different properties (sizes, shapes, and weights) and set two cans on their sides at

Yes, you can weigh your car by figuring out your wheel's tire pressure combined with the "tire's footprint." You'll need someone with a car, driver's license, and safety in mind.

In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.

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