Acoustic Tuning Fork Water Splash Wave Dispersion

20 mins Ages 7-9 Indoor

An engaging, screen-free learning activity that builds real-world creativity and critical thinking for kids aged 7 to 9.

Materials Needed

  • • Metal musical tuning fork (440 Hz or similar) (1 unit)
  • • Rubber striker or sneaker shoe heel (1 unit)
  • • Shallow ceramic or glass bowl of water (1 unit)
  • • Towel for drips (1 towel)

Pro Tips

  • → Strike the metal tuning fork against the rubber heel of a shoe to make it ring with a clean, clear tone.
  • → The vibrating tines move so fast they appear stationary to the naked eye.
  • → Touch the vibrating tines to the surface of a shallow bowl of water: it instantly blasts a fine mist of water droplets into the air.

Safety First

Strike tuning forks only against rubber or shoe soles; never strike against glass or hard tables.

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Step-by-Step Instructions

1

Step 1

Fill a shallow glass or ceramic bowl with water right up to the rim.

2

Step 2

Strike the tines of a metal tuning fork against a rubber block or the soft heel of a sneaker.

3

Step 3

Hold the ringing fork to your ear to listen to the pure tone, observing how the tines appear still.

4

Step 4

Dip the vibrating tips 2 mm into the water and watch the high-speed vibrations blast out a fountain of tiny water droplets.

What they are learning

High-frequency mechanical oscillation Kinetic acoustic energy transfer into liquids Cavitation and droplet spray physics