Physics - Sound

Question 1

Define SOUND

Answer 1

Sound - a way of transferring energy

Question 2

Define VIBRATIONS

Answer 2

Vibrations - the causes of sound waves

Question 3

Define MEDIUM

Answer 3

Medium - a solid, liquid or gas

Question 4

What does SOUND need to TRAVEL?

Answer 4

A medium

Question 5

Define FREQUENCY

Answer 5

Frequency - number of waves per second

- measured in Hertz (Hz)

Question 6

Define AMPLITUDE

Answer 6

Amplitude - the farthest a particle can move when vibrated

- measured in decibels (dB)

Question 7

Define INFRASOUND

Answer 7

Infrasound - anything below 20 Hz

Question 8

Define ULTRASOUND

Answer 8

Ultrasound - anything over 20,000 Hz

Question 9

Define the EAR CANAL

Answer 9

Ear canal - channels sound into the head

Question 10

Define the COCHLEA

Answer 10

The cochlea - turns vibrations into nerve impulses

Question 11

Define the DIAPHRAGM

Answer 11

The diaphragm - vibrates when sound reaches it

Question 12

Define the EAR BONES

Answer 12

The ear bones - pass on the vibrations and amplify them

Question 13

Define the AUDITORY NERVE

Answer 13

The auditory nerve - takes nerve impulses to the brain

Question 14

Define TRANSVERSE WAVES

Answer 14

Transverse waves - particles move at right angles to the wave
- e.g. water waves

Question 15

Define LONGITUDINAL WAVES

Answer 15

Longitudinal waves - particles move the same way as wave

- e.g. sound waves

Question 16

Define SUPERPOSITION

Answer 16

Superposition - when waves meet, they will either combine or cancel out

Question 17

Trough + Trough =

Answer 17

Bigger wave

Question 18

Crest + Crest =

Answer 18

Bigger wave

Question 19

Crest + Trough =

Answer 19

Cancelled out wave