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
What is a reflected sound that is heard again?
echo
What is the snail-shaped part of the ear that contains the actual organ of hearing?
cochlea
sonar is used for
determining the depth of the water and locating objects in the sea
two ears are better than one because
they help you tell which direction a sound is coming from
the bossy bird that plants oak trees
blue jay
the spangled birds brought from Europe that are now in every part of the United States and Canada
starling
the chubby little bird that chooses unusual places to nest
wren
the tiny bird whose name reminds you of the sound its furiously vibrating wings make
hummingbird
the cheerful bird that can hang upside down on a branch
chickadee
the bird who uses his extra-long tongue to probe holes for insects
woodpecker
the bird that walks headfirst down trees
nuthatch
the singing bird that mimics other birds
mockingbird
clouds are made of
air and water
anything that takes up space and has weight
matter
the particles which make up molecules
atoms
water is made of
hydrogen and oxygen
matter can exist in three states
solid, liquid, gas
the freezing point of water
32 degrees F
the boiling point of water
212 degrees F
because air has weight, it exerts
pressure
the process by which liquid water becomes water vapor
evaporation
the process bye which water vapor turns back to liquid
condensation
Be able to identify the parts of the ear.
Go look at your worksheet and study it.
Be able to identify these birds by looking at them.
Baltimore oriole blue jay chickadee grouse lark bunting mockingbird starling wren
