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Can gelatin (like Jell-O ®) change the speed of light?

In this design challenge activity, learners build a four-stringed instrument that can play a tune.

In this activity (Lesson 1), learners work in groups to create tide simulations.

In this activity, learners use tsunami time travel maps to predict how long it will take a tsunami to reach the shore.

Learners shine the light of a laser pointer through sheets of fabric that all have a different number of threads per inch.

In this activity on page 13 of the PDF, learners use a laser pointer (with known wavelength of light) to measure the thickness of a human hair.

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.

This lesson (on pages 15-24 of PDF) explores how sound is caused by vibrating objects. It explains that we hear by feeling vibrations passing through the air.