Sound Waves

Front

What happens when a wave reflects?

Back

It bounces off the surface of a barrier.

Front

Sound travels as a ____________ wave.

Back

longitudinal.

Front

The changing pitch of a police car's siren as it moves by you is an example of what?

Back

doppler effect.

Front

What unit is used to measure how loud or powerful a sound is?

Back

decibel.

Front

How does a sound wave with a lower pitch differ from one with a higher pitch?

Back

It has a lower frequency.

Front

What is the term for the distance between two consecutive peaks of a wave?

Back

wavelength.

Front

What is the speed of sound in air at room temperature?

Back

Approximately 343 meters per second.

Front

What is the phenomenon called when sound waves bounce off a surface?

Back

Reflection.

Front

What is the term for the maximum displacement of points on a wave from its rest position?

Back

Amplitude.

Front

What is the relationship between frequency and pitch?

Back

Higher frequency means higher pitch.