Download Y8_Sound_Key Words - Ralph Thoresby School

9541_p8_p452_462_sb4
2/4/01
P8
10:56 am
Page 455
Word sheets
Word sheets that include new words from the ‘Focus on:’ pages are available on the
Exploring Science website.
P8a – Sound advice
Word
Pronunciation
Meaning
Energy
Something that is needed to make things happen.
Gas
Something made of particles that are very spread out and have no bonds between
them.
Liquid
Something made of particles that are fairly close together, but with bonds that are
less strong than in solids. The particles can move past each other in a liquid.
Solid
Something made of particles that are very close together, held by strong bonds. The
particles cannot move past each other.
Sound
A form of energy made by something vibrating.
Vacuum
A completely empty space with no particles.
Vibrate
Move backwards and forwards.
P8b – Music to your ears
Word
Pronunciation
Amplitude
Frequency
Meaning
Half the height of a wave.
free-kwen-see
The number of waves each second.
Hertz (Hz)
The unit for frequency. 1 hertz means one wave per second.
Loudness
How loud a sound is; the volume of a sound.
Oscilloscope
oss-ill-O-skope
An instrument which shows a picture of a wave on a screen.
Pitch
How high or low a note sounds.
Wavelength
The distance between the tops of two waves.
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8
9541_p8_p452_462_sb4
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10:56 am
P8
Page 456
Word sheets (continued)
P8c – ’ear ’ear
P
8
Word
Pronunciation
Meaning
Auditory nerve
ord-i-tory
A nerve that carries electrical signals (impulses) from the ear to the brain.
Cochlea
cok-lee-a
The part of the ear that changes vibrations into electrical impulses.
Eardrum
A thin membrane inside the ear which vibrates when sound reaches it.
Ear bones
Small bones which transmits the vibrations of the eardrum to the inner ear.
Inner ear
The part of the ear that changes vibrations into electrical signals.
P8d – Annoyed by noise
Word
Pronunciation
Meaning
Decibel (dB)
dess-i-bell
Unit for measuring the loudness of a sound.
Noise
Unpleasant sound.
Sound intensity
meter
A meter which measures the loudness of a sound.
Sound intensity
The loudness of a sound.
Soundproofing
Materials that stop sound passing through something.
Threshold of
hearing
The quietest sound that can be heard.
P8e – Sound travelling light
Word
Pronunciation
Meaning
Echo
eck-O
A sound which is reflected back from something solid.
Reflected
Bouncing off something.
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