Look through the hole with both eyes at a distant object. Close one eye, then the other. The eye that keeps the object centered in the hole is the dominant eye. Procedure Ask each camper to try to roll the tip of his tongue into a circle. Ear Lobes Materials none Background for Instructors Ear lobe attachment is generally accepted to be an inherited trait and can be tested by observation.
Procedure Observe whether the bottom of a person's ear lobes are attached or unattached.
Observe and discuss the variation in this trait. Procedure Work in pairs. One person is the experimenter, the other is the subject. Ask the subject to taste one of the papers and record the response. Then offer the second paper and record the response.