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Ă‚m thanh
Sound
Nguồn âm
Sound source
Sóng âm
Sound wave
Dao Ä‘á»™ng
Vibration
When sound waves travel, places where particles are close together are called . . .
 
compressions
 
refraction
Between a solid and a gas, sound waves travel slower in the gas
 
TRUE
 
FALSE
When a sound source vibrates, the vibration travelling through a medium is called s___ w___.
 
sound waves
 
sound wall
 
sound will
 
sound wives
Among solids, liquids and gases, sound travels the . . . in gases.
 
slowest
 
fastest
Between a liquid and gas, sound waves travel . . . in liquid
 
faster
 
slower
Among solids, liquids, and gases, sound travels fastest in . . .
solids
Sound waves cannot travel in vacuum because there are few or even no p_rt_c_es to vibrate.
particles
Which of the following causes sound?
 
vibration from the sound sources
 
the size of the sound sources
 
the colour of the sound sources
 
reflection from the sound waves
When sound waves travel from West to East, in which direction do the vibration move?
 
West to East
 
East to West
 
air particles don't move
 
North to South
It can be seen many times in science-fiction movies that an explosion occurs in space and a loud "boom" is created. Is this possible?
 
No, because sound needs a medium to travel through.
 
Yes, because sound can travel in space.
 
No, because nothing can explode in space.
 
Yes, because sound can travel in space.
Why does sound NOT travel in a vacuum?
 
because there are no particles to vibrate
 
because it is too cold in a vacuum
 
because a vacuum is too large
 
because it is too dark in a vacuum
Why are whales and dolphins are able to communicate in water?
 
because sound waves can travel in liquids
 
because whales and dolphins have ears
 
because they swim in groups
 
because whales and dolphins live in water
Mary is sitting in her bedroom listening to her radio playing some music. Why can she hear the sound from her radio?
 
because sound waves travel through the air to her ears
 
because Mary and her radio are in the same room
 
because the music is pleasant
 
because the volume is low
Which statement is true about sound?
 
sound comes from sources that vibrate
 
sound comes from all objects
 
sound comes from the vacuum
 
sound comes from the ear
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