when watching fireworks, you see them burst open before you actually hear it, when it storms, you see lightning then hear thunder
What are examples of things that prove that sound takes time to travel?
200
air, water, wood, metals
What are things that water can travel through?
200
ten seconds after midnight
What is when was the cannon heard in the town common?
200
THe highness or lowness of a sound
What is pitch?
200
These cause your pitch to be lower
What are slower vibrations?
200
the loudness of sound are maesured in these
What are decibles?
300
you will never, ever hear anything in this place
What is space?
300
This causes your pitch to become higher
What are faster vibrations?
300
The pitch of these instruments depends on the length, thickness and tightness of the strings.
What are string instruments?
300
Caused by something moving faster than the speed of sound
What is a sonic boom?
300
When we speak, these vibrate
What are vocal chords
400
A vibrating object causes air molecules to bump into each other and those bump into others.
What is a sound wave?
400
possibly the loudest sound ever heard on Earth
What is a meteorite impact
400
converts sound energy into electrical energy, and back into sound energy again. It was invented in 1876 by Alexander Graham Bell, a teacher of the deaf.
What is the telephone?
400
the speed of sound in air is dependent on this
What is the air temperature?
400
knowing the distance from an action and timing the length of time a sound takes to reach us enables us to calculate this
What is the speed the sound is traveling
500
The level of the weakest sound that can be heard by the human ear
What is the threshold of audibility ?
500
Sounds or clicks that are produced by some mammals- these reflect off objects and allow them to hunt and find their way in the dark--
What is echolocation?
500
The loudest sound that can be heard and may cause pain to the ear
What is the threshold of pain?
500
Quicker to return to your ear than an echo
What is reverberation?
500
inspired by musical wine glasses he heard played in Europe led Ben Franklin to this invention in 1761