Light, Sound - Keywords

Question 1

Amplitude

Answer 1

How tall a wave is from the centre

Question 2

Auditory nerve

Answer 2

A nerve that sends vibrations (sound signals) to the brain

Question 3

oscilloscope

Answer 3

Shows wave patterns and allows us to “see” sound

Question 4

Unit of amplitude of sound wave

Answer 4

Decibels (dB)

Question 5

Cochlea

Answer 5

Turns vibrations into electrical signals

Question 6

Decibel (db)

Answer 6

A unit for measuring how loud a sound is

Question 7

Doppler effect

Answer 7

The change of a pitch/frequency from a moving object (for example a car that is going fast)

Question 8

Eardrum

Answer 8

Sound waves are turned into vibration

Question 9

Frequency

Answer 9

How many complete waves pass through a point in one second

Question 10

Hertz (hz)

Answer 10

The unit for measuring the frequency of a wave

Question 11

Infrasound

Answer 11

Sound lower than 20hz

Question 12

Intensity

Answer 12

Amount of sound in decibels divided by the area that the sound covers

Question 13

Loudness (how do we know based on a sound wave how loud the sound will be?)

Answer 13

The higher the amplitude, the louder the sound

Question 14

Medium

Answer 14

Something that sound can travel through (particles for example).

Question 15

Noise (What is it)

Answer 15

An unlikeable sound

Question 16

Noise pollution

Answer 16

Noise(s) that affect us on a daily basis (like a classroom, traffic, machines etc)

Question 17

Ossicles (malleus, incus, stapes)

Answer 17

Three bones in the inner ear that helps sound waves to travel

Question 18

Pitch (how is a pitch increased in a wave)?

Answer 18

When the frequency of a wave is higher (more waves passing through per second), the higher the pitch will be.

Question 19

Ultrasound

Answer 19

Sound with frequency of 20000hz or higher

Question 20

Vacuum

Answer 20

Where there is nothing. Sound cannot travel here because there are no particles in the air for it to travel through.

Question 21

Soundwaves

Answer 21

A wave made of tight and thin air that spreads out.

Question 22

Wavelength

Answer 22

The distance from a wave’s peak to peak or trough to trough.