Sound and Light

Front

What is sound?

Back

Sound is a form of energy that travels in waves and is produced by vibrations.

Front

What is light?

Back

Light is a form of energy that travels in waves and can be seen by the human eye.

Front

How does sound travel?

Back

Sound travels through a medium, such as air, water, or solid materials.

Front

How does light travel?

Back

Light can travel through a vacuum (empty space) and does not need a medium.

Front

What is a medium?

Back

A medium is the substance through which a wave travels, such as air for sound.

Front

What causes sound?

Back

Sound is caused by vibrations that create waves in a medium.

Front

What is vibration?

Back

Vibration is a rapid back-and-forth movement that produces sound.

Front

What travels faster, sound or light?

Back

Light travels faster than sound.

Front

Can sound travel in space?

Back

No, sound cannot travel in space because there is no medium (air) for it to travel through.

Front

What is the speed of light?

Back

The speed of light is approximately 299,792 kilometers per second (186,282 miles per second).