Sound waves require a medium (or particles) in order to travel

• true
• false

What is intensity?

• The amount of energy in a wave
• the loudness of a wave

What is loudness?

• The amount of energy in the wave
• How humans interpret intensity of a wave

Higher amplitude means..

• a quiet sound
• a loud sound

A low intensity sound would be

• a scream
• a whisper

Higher intensity sounds have more energy and

• travel longer distances
• travel short distances

What is pitch?

• How loud a sound is
• How high or low a sound is

High pitch sounds have...

• a high frequency
• a low frequency

The doppler effect is

• When the picth of a sound changes depending on an objects location
• The loudness of a sound changes with the increase in intensity

An ambulance's siren changing pitch as it approaches you is an example of

• intensity
• amplitude
• doppler effect