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To describe echoes and superposition

Science - Light and Sound

Mr Inder

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Questions (Video)

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Use of echoes

Which other animal would likely use echolocation?

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Image credit: Pixabay

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Quick quiz 1

Would this pair of waves add together or cancel each other out?

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Quick quiz 2

Would this pair of waves add together or cancel each other out?

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Quick quiz 3

Which of these items would be good for soundproofing a room in your house?

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Image credit: Pixabay

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Questions (Worksheet)

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Echoes

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  1. What is an echo?��
  2. What kinds of surfaces absorb sound?��
  3. Which types of surfaces are best at reflecting sound?��
  4. What happens to the temperature of a surface that can absorb sound?

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Superposition

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  • Fill in the blanks:�Superposition is when ______ or more waves interact and either

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_______________ or _________________.��

  • What would happen to the sound if the following waves combined?��

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Answers (Video)

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Use of echoes

Which other animal would likely use echolocation?

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Image credit: Pixabay

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Quick quiz 1

Would this pair of waves add together or cancel each other out?

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Quick quiz 2

Would this pair of waves add together or cancel each other out?

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Quick quiz 3

Which of these items would be good for soundproofing a room in your house?

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Image credit: Pixabay

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Answers (Worksheet)

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Echoes

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  • What is an echo?�When a sound wave reflects off a surface.�
  • What kinds of surfaces absorb sound?�Rough surfaces (e.g. sponge, foam and carpet) all absorb sound instead of reflecting it.�
  • Which types of surfaces are best at reflecting sound?�Flat, hard, smooth surfaces are best at reflecting sound.�
  • What happens to the temperature of a surface that can absorb sound?�When a surface absorbs sound, its temperature increases due to energy transfer.

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Superposition

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  • Fill in the blanks:�Superposition is when two or more waves interact and either �add together or cancel each other out.��
  • What would happen to the sound if the following waves combined?��������Cancel each other out.

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