a clean flat area to do the projects:
“A rapid back-and-forth movement.”
to figure this out.
out into the air to make
things jump and vibrate at a distance.
sheet
large spoon
or metal pot
plastic wrap
sugar
or salt
over the top of a pot
or coffee can.
or salt onto
the plastic wrap.
to the sugar or salt on the
plastic wrap as you bang
the cookie sheet?
the side
to see
the crystals
jump.
with the large metal spoon.
Does the result vary as you get closer with the banging?
back-and-forth
movement!
when you banged on the cookie sheet.
it made the air surrounding it vibrate, too.
and the plastic wrap.
as the plastic wrap vibrated!
or paper towel tube
rubber
band
toward one end
of the tube.
wax paper around
one end
of the tube.
Get a friend and strike up the band!
the open end
of the kazoo.
Do you feel the
make sounds.
are
vibrations!
the neck
of the
balloon vibrate.
in your kit.
it squeak
by stretching the neck
of the balloon to release
the air slowly.
through the squeezed
opening makes
sound vibrations.
vibration detectors!
that stiff oddly-shaped structure
on either side of your head.
in the diagram of the ear
(HINT: It is a light green.)
Where is this canal in your ear?
Now click on the outer
visible portion of the ear.
This canal, along with
the visible portion of the ear,
is called the OUTER EAR.
or eardrum
of the canal is a thin stretch
of tissue called the eardrum
or tympanic membrane.
When sound vibrations reach the tympanic membrane,
it vibrates much as did the plastic wrap on the coffee can or the wax paper on the kazoo.
bone next
to the eardrum
(light blue) called
the malleus
(mal-ee-us).
The eardrum vibrations cause
the three tiny bones in
your MIDDLE EAR to move.
last bone, the smallest bone in your body,
called the stapes
(stay-peas).
next tiny bone
in the middle ear
called
the incus
(ink-us).
in the MIDDLE EAR is to transfer sound vibrations from the AIR (gas),
to the FLUID (liquid) in the cochlea
(koh-klee-uh) located in the INNER EAR.
It is shaped like the shell of a snail.
into signals that are sent down the auditory nerve to your brain.
Your brain then interprets these signals as sounds.
in
FULL
SCREEN
MODE!
