4th Grade Science Test 6 Flashcards
sound waves travel fastest through
solids
sound travels faster/slower than light
slower
sound is a form of
energy
sound waves can/cannot travel through empty space
cannot
speech is produced by the vibrations of the
vocal chords
the ___ ear includes the hammer, anvil, and stirrup.
middle
the auditory ___ carries the message of sound to the brain
nerve
when an object vibrates very rapidly, the sounds produced have a ___ pitch
high
the ___ frequency that the human ear can hear is 20 times per second
lowest
name two animals that hear the highest frequency sounds
bats and dolphins
materials with soft, uneven surfaces tend to ___ sound waves
absorb
“sees” with its ears
bat
the only animals that have visible outer ears
mammals
the inventor of the phonograph
Thomas Edison
the inventor of the telephone
Alexander Graham Bell
the man who proved that sound waves travel only through matter
Robert Boyle