Sounds travel through the air as __________, just like water waves spread when you throw a stone into a pond
waves
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
In space, it is perfectly quiet because space is a __________. This means there is no air to carry the sound waves.
vacuum
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
What causes sound waves to form?
Vibrations in a material such as air, water, or solids
Why can't sound travel through space?
Because space is a vacuum and has no particles to carry the vibrations
Through which material does sound travel fastest: air, water, or steel?
Steel
What happens to the sound of the watch as air is removed from the jar?
It becomes quieter until it cannot be heard
