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Science

Sound and Vibration

Overview

Children investigate how sounds are made by touching vibrating objects and making simple instruments.

Learning Objective
Children understand that sound is caused by vibration and can demonstrate this using simple everyday materials.

Resources needed

  • A rubber band
  • A stretched string or wire
  • A drum made from any container with stretched cloth or paper
  • A ruler

Lesson stages

0 / 7 done
  1. 1 Ask: what is sound? Where does it come from?
  2. 2 Flick a rubber band — feel the vibration with your finger as it makes a sound.
  3. 3 Touch a drum or stretched string gently — feel the vibration.
  4. 4 Ask: what happens to the sound when the vibration stops? (touch the string to stop it).
  5. 5 Make a simple string telephone: two containers connected by a taut string.
  6. 6 Talk into one container while a partner puts their ear to the other.
  7. 7 Ask: what is carrying the sound from one end to the other?

Tap a step to mark it as done.

Variations

  • Compare sounds made by thick and thin strings — which makes a higher pitch?
  • Test sound through different materials: water, wood, metal, air.
  • Make a simple pan pipe from different lengths of hollow tube or bamboo.
More information

Teach: sound, vibration, travel, pitch, loud, soft, string telephone, material. The key concept — vibration causes sound — must be experienced physically, not just explained.

Focus on just one demonstration — the rubber band — and fully establish the vibration concept before moving to others.

Can children explain that sound is caused by vibration? Can they demonstrate this by making something vibrate and produce a sound?

A rubber band on any box makes a simple instrument. String from any source and two containers make a telephone. No specialist equipment needed.

Children often think sound is just 'in the air.' Demonstrating vibration through solids — putting an ear to a desk and tapping the other end — shows that sound travels through materials, not just air.

Understanding vibration as the cause of sound is the foundation for acoustics, music physics, and seismology. The string telephone is one of science education's most powerful simple demonstrations.

Activity details
Primary Easy 20 minutes 5 minutes prep Whole Class, Small Group Indoor & Outdoor
Topics
Sound Vibration Physics