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In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this activity, learners estimate risks associated with different events and compare their estimates to the real possibilities.

In this activity, learners investigate the sense of hearing and plan and conduct their own experiments.

In this activity (4th activity on the page), learners test to see if saliva is necessary for food to have taste.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.