Question

sound waves belong to a group called mechanical waves - specifically, longitudinal waves. the waves they need a material, called a medium, to travel through - unlike light waves that can move through empty space. sound waves involve compressions, where particles are pressed together, and rarefactions, where they spread out.
this speed of travel changes depending on the material it travels through. it moves fastest through solids because the particles are packed closely together, making it easier for the energy to pass through. liquids come next, and sound waves move slowest through gases due to the spaced-out particles.
choose the correct answer.
sound waves travel slowest in which medium?
gas
solid
liquid

Explanation:

Sound waves are mechanical waves that need a medium to travel. In solids, particles are closely packed, allowing quick energy transfer. In liquids, particles are less closely packed than solids but more than gases. In gases, particles are far apart, making energy transfer (and thus sound wave travel) slowest.

Answer:

gas