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Explore the effects of gravity on a slowly falling object: a parachute you make out of plastic bags, string and stones.

In this activity and/or demonstration, learners illustrate visually and physically that air has weight. Learners balance two equally-inflated balloons hanging from string on a yard stick.

This is an activity about center of gravity. Learners will balance a fork on a glass by finding its center of gravity.

In this activity, learners make a foam packing peanut "flink"--neither float away nor sink--in water. Learners experiment with materials to make a Flinker that "flinks" for 10 seconds.