Unit 3 - Light and Sound

Front

In General, sound waves travel the fastest in __________.

Back

solid

Front

When the frequency of a sound changes because the source is moving, it is called the _____.

Back

doppler effect

Front

Sound waves must travel through a ____________.

Back

medium

Front

When light is _____________, it passes from one transparent material to another and changes direction.

Back

refracted

Front

In General, sound waves travel the slowest in __________.

Back

Gas

Front

What is a sound wave?

Back

A sound wave is a vibration that travels through a medium (solid, liquid, or gas) and can be heard when it reaches a person's or animal's ear.

Front

What is the medium in sound transmission?

Back

The medium is the substance through which sound waves travel, such as air, water, or solids.

Front

What happens to sound waves in a vacuum?

Back

Sound waves cannot travel in a vacuum because there are no particles to transmit the vibrations.

Front

What is the pitch of a sound?

Back

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

Front

What is reflection of light?

Back

Reflection of light occurs when light bounces off a surface, such as a mirror.