Sound and Waves

Question 1

Sound is a _______________ wave.

Answer 1

Sound is a longitudinal wave.

Question 2

What is a longitudinal wave?

Answer 2

A wave where the particles move forwards and backwards in the direction that the wave travels.

Question 3

What is sound measured in?

Answer 3

Decibels (dB)

Question 4

What is pitch?

Answer 4

The pitch of a sound is how high or low the sound is. A high pitch sound has faster vibrations and higher wave frequency. A low pitch has slower vibrations and a lower wave frequency.

Question 5

What is frequency?

Answer 5

Frequency is the number vibrations of the wave in one second, also seen as the number of complete waves passing a point in one second.

Question 6

What is frequency measured in?

Answer 6

Hertz (Hz)

Question 7

What is the lowest pitch that humans can hear?

Answer 7

20Hz

Question 8

What is the highest pitch that humans can hear?

Answer 8

20,000Hz

Question 9

What is a transverse wave?

Answer 9

A wave in which the particles move up and down at right angles to the direction it travels in, like an ocean wave or lifting a rope up and down.

Question 10

What is amplitude?

Answer 10

The height of the top of a wave from its resting position. The greater the amplitude, the taller the wave (and the louder the sound if a sound wave).