An overview of light that describes where it comes from, how it travels, shadows, reflections, mirrors, rainbows, and colors; and discusses times of day and how the eye works. Includes related activities, a glossary, and a list of resources.
An overview of sound that describes where it comes from, how it travels, echoes, and pitch; and discusses how the ear works, deafness, and how sound is measured. Includes related activities, a glossary, and a list of resources.
