Questão 1
Questão
Sound is a form of what
Questão 2
Questão
Sounds are made when things do what
Questão 3
Questão
Which of the following can sound pass through
Responda
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solids
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liquids
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vacuum
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gases
Questão 4
Questão
The speed of sound is faster through materials that have particles that are closer together - true or false
Questão 5
Questão
sound energy moves in all directions because the particles move in all directions unless something stops them - true or false
Questão 6
Questão
the unit of frequency is called what
Questão 7
Questão
Sound waves with a high frequency produce sounds with a
Questão 8
Questão
The amplitude refers to what about a sound wave
Questão 9
Questão
the loudness of a sound depends on what
Questão 10
Questão
louder sounds have more or less energy
Questão 11
Questão
louder sounds have bigger or smaller amplitudes
Questão 12
Questão
sound waves travel through what before entering the ear
Questão 13
Questão
sound waves cause the ear drum to do what
Questão 14
Questão
the vibrations are passed onto the what
Questão 15
Questão
sounds cause what to vibrate
Responda
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the ear drum
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the ear lobe
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the ear canal
Questão 16
Questão
people who are exposed to loud noises for long periods of time are at risk of what
Questão 17
Questão
to avoid loud noise damage people often wear what
Responda
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hats
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ear protection
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glasses
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a tie
Questão 18
Questão
unpleasant sound is often called what
Questão 19
Questão
your hearing can get bad due to which of the following
Responda
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getting old
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listening to loud music
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illness
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mums nagging
Questão 20
Questão
he loudness of a sound is measured in
Responda
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decibels (dB)
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volts (V)
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amps (A)
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watts (w)
Questão 21
Questão
The threshold of hearing is what
Questão 22
Questão
soft materials do what
Responda
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reflect sound
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absorb sound
Questão 23
Questão
what materials are used for sound proofing
Responda
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hard materials
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soft materials
Questão 24
Questão
light energy can travel through space (a vacuum) but sound energy cannot - true or false
Questão 25
Questão
which travels faster light or sound
Questão 26
Questão
light travels at what speed
Questão 27
Questão
sound travels at what speed
Responda
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about 330 meters per second
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about 3000 meters per second
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about 3 meters per second
Questão 28
Questão
both light waves and sound waves can be reflected - true or false
Questão 29
Questão
when sound waves are reflected we call it what