# American Physical Society

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

\$1 - \$5 per group Ages 11 - 14 45 to 60 minutes
Source Institutions
Learners drop two different masses of play dough and observe how long it takes them to hit the ground.

\$1 - \$5 per student Ages 11 - 14 30 to 45 minutes
Source Institutions
In this physics activity, learners use square blocks to explore how towers fall. Learners attach a piece of string to the side of a block and then construct a tall tower on top of this base block.

1 cent - \$1 per student Ages 8 - 14 5 to 10 minutes
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Learners experiment with water gel crystals, or sodium polyacrylate crystals, which absorb hundreds of times their weight in water. When in pure water, the water gel crystals cannot be seen.

\$5 - \$10 per group Ages 11 - 18 45 to 60 minutes
Source Institutions
Learners use compasses to detect the magnetic field created by current moving through a wire. This is one of four activities learners can complete related to PhysicsQuest 2008.

\$1 - \$5 per group Ages 11 - 18 45 to 60 minutes
Source Institutions
Learners use the current flowing in a wire to create a magnetic field that turns a magnet. Learners can use this property of electromagnetism to build a magnet-powered pinwheel.

\$1 - \$5 per student Ages 11 - 18 10 to 30 minutes
Source Institutions
Learners drop a magnet through a coil of wire to create electric current in a circuit. LEDs in the circuit allow learners to detect the direction of current flow.

\$5 - \$10 per group Ages 11 - 18 30 to 45 minutes
Source Institutions
Learners examine the properties of light by experimenting with an LED-flashlight and polarizing filters. When two polarizers are used, they block all light when they are placed at right angles.

\$10 - \$20 per group Ages 11 - 14 10 to 30 minutes
Source Institutions
On an airplane trip, learners have an opportunity to investigate the properties of air pressure at different altitudes.

free Ages 6 - 14 30 to 45 minutes
Source Institutions
In the kitchen, learners can perform their own density investigation.

1 cent - \$1 per student Ages 8 - 14 5 to 10 minutes