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This activity is designed to let learners measure their reaction time or response time to something they see.

In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

In this activity, learners use their senses to collect information about a fruit and record their findings in a Science Journal.

In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.

In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.

Learners will explore the concept of angular distance, and investigate why the moon appears to be the same size as the sun during a solar eclipse, despite the sun being much larger.

In this activity, learners investigate how geometry plays a role in perspective.

This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

Use this hands-on activity to demonstrate infrared and thermal radiation.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

In this activity, learners investigate the sense of sight and develop and conduct their own experiments.