Science at key stage 3 (Year 8)
Unit 8L: Sound and hearing
Section 7: b. How do we hear sounds?
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Objectives |
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- that the energy of sound is transferred through the eardrum
- that the effects of vibration to the eardrum are transferred to the brain
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Activities |
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Outcomes |
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Children: |
- Elicit ideas from pupils about how we hear sounds. Show them an anatomical model of the ear, illustrating the relative sizes of the parts and how they are connected.
- Explain how the eardrum vibrates as a result of sound entering the ear, and the transmission of vibrations to the inner ear. A model eardrum can be used to demonstrate the transmission of vibrations from the air to a membrane.
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- identify the parts of the ear on a diagram or model
- describe,
eg by annotating a diagram, how vibrations in the air are transmitted and translated into electrical signals, which pass to the brain
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Points to note |
- A full explanation of the working of the ear is not required. Work with pupils should concentrate on developing an understanding of the transmission of vibrations and their conversion to electrical signals, which pass to the brain.
- Make a model eardrum by removing the end of a plastic cup, and covering the hole left with clingfilm. The clingfilm will vibrate when you talk into the open end of the cup.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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