Sound is a form of what
Energy
noise
Sounds are made when things do what
band together
vibrate
Which of the following can sound pass through
solids
liquids
vacuum
gases
The speed of sound is faster through materials that have particles that are closer together - true or false
true
false
sound energy moves in all directions because the particles move in all directions unless something stops them - true or false
the unit of frequency is called what
decibels
Hertz
Sound waves with a high frequency produce sounds with a
High pitch
Low pitch
The amplitude refers to what about a sound wave
the height of the sound wave
the distance between each wave
the loudness of a sound depends on what
the frequency of the sound wave
the amplitude of the sound wave
louder sounds have more or less energy
less
more
louder sounds have bigger or smaller amplitudes
bigger
smaller
sound waves travel through what before entering the ear
the air
a vacuum
sound waves cause the ear drum to do what
buzz
the vibrations are passed onto the what
the cochlea
the brain
sounds cause what to vibrate
the ear drum
the ear lobe
the ear canal
people who are exposed to loud noises for long periods of time are at risk of what
going blind
damaging their hearing and going deaf
getting a head ache
to avoid loud noise damage people often wear what
hats
ear protection
glasses
a tie
unpleasant sound is often called what
music
talking
your hearing can get bad due to which of the following
getting old
listening to loud music
illness
mums nagging
he loudness of a sound is measured in
decibels (dB)
volts (V)
amps (A)
watts (w)
The threshold of hearing is what
the loudest sound we can hear
the quietest sound we can hear
none of the above
soft materials do what
reflect sound
absorb sound
what materials are used for sound proofing
hard materials
soft materials
light energy can travel through space (a vacuum) but sound energy cannot - true or false
which travels faster light or sound
light
sound
light travels at what speed
300 meters per second
300 million meters per second
3000 meters per second
sound travels at what speed
about 330 meters per second
about 3000 meters per second
about 3 meters per second
both light waves and sound waves can be reflected - true or false
when sound waves are reflected we call it what
a wave
an echo
a noise