Revision For Sound Waves

Question 1

Amplitude

Answer 1

The maximum height of the wave from the middle of the wave to its crest

Question 2

Echo

Answer 2

A sound caused by the reflection of sound waves from a smooth surface to the listener

Question 3

Frequency

Answer 3

The number of sound waves produced each second

Question 4

What is the unit of frequency?

Answer 4

Hertz (Hz)

Question 5

Longitudinal wave

Answer 5

A wave that moves the same direction as the direction in which the particles are vibrating

Question 6

Oscilloscope trace

Answer 6

The wave pattern seen on the screen of the oscilloscope

Question 7

Pitch

Answer 7

The frequency of a sound

Question 8

Sounds with a high pitch have…

Answer 8

A high frequency

Question 9

Reflect

Answer 9

Bounce off

Question 10

True or false:

Hard surfaces like walls reflect sound well

Answer 10

True

Question 11

Reflection

Answer 11

Happens when a wave bounces of a surface

Question 12

What is a sound with a frequency higher than 20,000 Hz called?

Answer 12

Ultrasound

Question 13

The length of a single wave measured from one wave crest to the next is called…

Answer 13

Wavelength