Propagation of sound through liquids in Sound – Class 8 Science Experiment

Chapter Name: Sound

Activity Name: Propagation of sound through liquids in solids in Sound

Activity Description:

Propagation of sound through liquids in Sound - Class 8 Science Experiment

This experiment aims to demonstrate the propagation of sound through liquids and compare it to sound transmission through air. By striking stones together inside a bucket of water and observing the sound produced, students will gain insights into how sound behaves in different states of matter.

Required Items:

  1. Bucket
  2. Water
  3. Two stones

Step by Step Procedure:

  1. Fill the bucket with water.
  2. Take the two stones and strike them against each other underwater, keeping your hands submerged.
  3. Ask your friend to place their ears against the walls of the bucket to listen to the sound produced.
  4. Compare the sound produced underwater to the sound produced when striking the stones together in the air.

Experiment Observations:

  1. Students should observe that sound can propagate through water, as their friend can hear the sound with their ears against the bucket’s walls. They may notice differences in the intensity or pitch of the sound compared to when the stones are struck together in the air.


  • Ensure that the bucket is stable and won’t tip over during the experiment.
  • Be cautious while striking the stones together to avoid splashing water.
  • Use stones that are not too heavy or sharp to prevent any accidents.

Lesson Learnt from Experiment:

Through this experiment, students will learn that sound can travel through different states of matter, including solids (stones), liquids (water), and gases (air). The activity illustrates that sound waves can propagate through various mediums, and the speed and characteristics of sound may vary depending on the medium through which it travels.

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