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This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing.

In this game (4th activity on the page) about hearing, learners test their ability to identify various sounds without looking.

In this game-like activity (5th activity on the page), learners explore their auditory acuity as well as the importance of having two ears.

In this activity (11th activity on the page), learners use pennies to test their hearing acuity.

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