Front

What is sound?

Back

Sound is a type of energy made by vibrations that travels through matter.

Front

What are vibrations?

Back

Vibrations are rapid back-and-forth movements of particles in a medium.

Front

How does sound travel through different materials?

Back

Sound travels at different speeds through solids, liquids, and gases; it travels fastest in solids.

Front

What is the medium in sound travel?

Back

The medium is the substance (solid, liquid, or gas) through which sound waves travel.

Front

What is the role of the eardrum?

Back

The eardrum vibrates when sound waves hit it, allowing us to hear.

Front

What is the cochlea?

Back

The cochlea is a spiral-shaped part of the inner ear that contains hair cells that convert sound vibrations into nerve signals.

Front

What is loudness?

Back

Loudness is how loud or soft a sound is, determined by the amplitude of the sound wave.

Front

What is frequency in sound?

Back

Frequency is the number of vibrations per second, measured in Hertz (Hz).

Front

What is pitch?

Back

Pitch is how high or low a sound is, which is determined by the frequency of the sound wave.

Front

What is an example of a high-frequency sound?

Back

A whistle produces a high-frequency sound.