The scientist Robert Boyle proved that sound does not travel through a vacuum. He placed a __________ in a jar and removed the air.
ticking watch
Sounds travel through the air as __________, just like water waves spread when you throw a stone into a pond
waves
Through which material does sound travel fastest: air, water, or steel?
Steel
In space, it is perfectly quiet because space is a __________. This means there is no air to carry the sound waves.
vacuum
What happens to the sound of the watch as air is removed from the jar?
It becomes quieter until it cannot be heard
Why can't sound travel through space?
Because space is a vacuum and has no particles to carry the vibrations
What causes sound waves to form?
Vibrations in a material such as air, water, or solids
Sound waves travel through __________ and __________ as well as air.
solids and liquids
The particles in solids and liquids are closer together than in gases, so they pass on sound vibrations __________.
faster