Heat, Light,
and
Sound
Review and Study Guide
Which of the these might
damage hearing?
A Jet plane taking off (160 decibels)
or a chain saw (110 decibels)
Which of the following would
be annoying but not
damaging to hearing?
A hair dryer (90 decibels) and
a ringing telephone (80 decibels)
Heather put a straw in a glass of water.
When she looked at the side of the glass
she observed that the straw appeared
larger and also appeared to be broke.
Why did it appear this way?
When the light hit the glass of
water
It refracted
How could a
guitar be
made to
make a louder
sound?
Pluck the strings
harder, with more
energy!
~~~~~~~~~~~~~
What is the angle of
reflection of trial “One”?
The angle of reflection would be 10 degrees.
What is the angle of
incidence of trial “Two?”
The angle of incidence would be 45 degrees.
What would you do to
lower the pitch of a
string on a violin?
You would
loosen the
strings.
Never cut the
strings! ;)
If you were arranging the tubes
below to play a tune, which one
would make the lowest pitch?
Tube A
(think flute vs piccalo)
What happens if you
increase the frequency of
a sound?
 The sound will get higher.
 Frequency refers to the speed with which a
sound is vibrating, faster means higher pitch,
slower frequency means lower pitch.
What would happen if you
increased the intensity of a
sound?
 The sound would get louder!
What causes an echo?
Sound waves are
Reflected
Or bounced -----off an object.
What is the best activity to
help keep a home cool in
the summer?
 A- Open the refrigerator often.
 B -Close the shade where the sun is shining.
 C- Open the windows during the day.
 D- Turn off the television, radios, and
computers.
B- Close the shade
where the sun is shining!
What happens to the light
particle when light his an
uneven surface?
 A- They are scattered in many directions.
 B- They pass through the surface.
 C- They are absorbed by the surface.
 D- They are reflected off in a straight line.
A. They are scattered in
many directions.
Which of the following is an
example of a reflector?
 A- Stars
 B- Lightening
 C- The planet Mars
 D- Exploding Fireworks
C. Mars (Not to
mention the Moon!)
What happens to a sound as
the vibrations of an object
increase in strength?
 A- The pitch of a sound is higher.
 B- The sound becomes softer
 C- The sound waves get further apart.
 D- The sound becomes louder.
D- The sound
becomes louder.
Nate was stirring hot soup on
the stove. Why should he use
a wooden spoon instead of a
metal spoon?
 A- Wood conducts heat very well and metal
does not.
 B- It doesn’t matter which spoon he uses.
 C- Wooden spoons cost less.
 D- Metal conducts heat very well and wood
does not.
D- Metal conducts heat very
well and wood does not.
Explain the difference
between a light producer and
a light reflector.
 A- A light producer bends light and a light
reflector breaks light
 B- A light producer sends light and a light
reflector stops light back
 C- A light producer makes light and an light
reflector bounces light back.
 D- A light producer bounces light back and
a light reflector creates light
C- A light producer makes light and
an light reflector bounces light back.
What material is a good
example of transparency?
 A- Glass
 B- Foil
 C- Moon
 D- Wax paper
A- Glass
What would you do to
increase the intensity of the
sound that a drum makes?
 A- Make the drum head out of thicker
material.
 B- Loosen the drum head.
 C- Tap the drum head harder.
 D- Tighten the drum head.
C- Tap the drum head harder.
Which of the following is
an example of a light
producer?
 A- The moon
 B- A campfire
 C- A concave mirror
 D- A red shirt.
B- A campfire
What makes a hot air balloon rise?
The particles of air in the balloon __
 A- are closer together and make the
balloon lighter than air.
 B- are farther apart and make the balloon
lighter than air.
 C- increase in size and make the balloon
lighter than air.
 D- decrease in size and make
the balloon lighter than air.
B- are farther apart and make
the balloon lighter than air.
Which of the following is an
example of heat conduction?
 A- Cool air sinking to the ground on a cold
night
 B- The sun melting the ice formed on a frosty
lawn.
 C- A metal cup heating up when hot water
is poured into it.
 D- An air vent from a furnace
sending hot air into the house.
C- A metal cup heating up
when hot water is poured into it.
In a room in the wintertime,
where would you find the
warmest air?
 A- Near the ceiling
 B- Near the floor
 C- in the corners
 D- By a window
A- Near the ceiling
Why do you see your
image in a mirror?
 A- Light is diffused
 B- Light is absorbed
 C- Light is refracted
 D- light is reflected
D- light is reflected
Why is wax paper
classified as translucent?
 A- it allows heat to pass through it
 B- it allows some light to pass through it
 C- it allows some sound to pass through it
 D- it allows no light to pass through it
B- it allows some light to pass
through it
Any Questions?
The answer is, “Yes, you should study for the test
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