Transcript Jeopardy! 8 Grade- Physics: Energy

Jeopardy!
8th Grade- Physics: Energy
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Final Jeopardy
A. Chemical to heat energy
Identify the energy change that takes place as a
candle burns.
A. Mechanical to electric energy
B. Electric to mechanical energy
C. Electric to heat energy
D. Chemical to heat energy
E. Chemical to electric energy
$200
C.
On a hot day, a student walked home from the grocery store
with a bag of chocolate chips. When she arrived home the
chocolate chips had melted in the bag. Why did the chocolate
chips melt?
A. Heat transferred from the chocolate chips to the bag.
B. Heat evaporated from the bag to the chocolate chips.
C. Heat transferred from the environment to the chocolate
chips.
D. Heat condensed from her hand to the chocolate chips.
$400
C.
When air near the ground is warmed by sunlight,
which of the following occurs?
A. The warm air radiates and becomes cool again.
B. The warm air evaporates into the cooler air.
C. The warm air expands and rises, resulting in
convection.
D. The warm air loses its ability to hold water and
precipitates.
$600
A.
Four containers of water with different temperatures are
placed on a table as shown below. The temperature of
the room is 250 C. After four hours, which beaker of
water will have exchanged the most heat energy with
the environment?
A.
W
B.
X
C.
Y
D.
Z
$800
B.
A flowing stream contains water at 18o C. Cans of soft drinks
at 28o C. are lowered into the stream. Which of the following
will most likely occur?
A. The soft drink cans will absorb cold energy from the
stream's water.
B.
The cans will cool until their temperature is the same as
the stream's.
C. The temperature of the soft drinks will not change since
the cans are sealed.
D. The temperature of the cans will decrease to freezing as
long as the stream is flowing.
$1000
C.
Which type of energy transfer occurs when a beaker
of water is heated on a hot plate?
A.
light to heat
B.
chemical to heat
C.
electrical to heat
D.
magnetic to heat
$200
B. B or D
A ball is bounced on a flat surface and its path is traced in the
drawing above after being thrown down at point A. Where in
the ball's path is its kinetic energy the least?
A. A or C
B. B or D
C. C only
D. D only
$400
B. B
A ball is bounced on a flat surface and its path is traced in the
drawing above after being thrown down at point A. Where in
the ball's path is its potential energy the greatest?
A. A
B. B
C. C
D. D
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C. Position 3
Where is potential energy the greatest?
A. Position 1
B. Position 2
C. Position 3
D. Position 4
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C. C
A ball is thrown into the air as
shown to the right. At what point
in the path of the ball is kinetic
energy entirely changed into
potential energy?
A. A
B. B
C. C
D. D
$1000
B.
Describe the amount of potential energy in a bouncing
ball.
A. it has the most potential energy when the ball hits the
ground
B. there is more potential energy at the highest point of the
bounce
C. with each bounce, there is an increasing amount of
potential energy at the top of the bounce
D. more potential energy is found halfway between the
ground and the top of the bounce
$200
D. increase the distance between them
Which of the above tuning forks will generate
the lowest pitch?
A.
A
B.
B
C.
C
D.
D
$400
D.
hat would need to be done to this glass in order to
lower the pitch?
A.
Narrow the mouth of the glass
B.
Widen the mouth of the glass
C.
Raise the level of water
D.
Lower the level of water
$600
C.
Two scientists wish to measure the speed of sound. Scientist
I measures how long it takes a sound to travel a large
distance. Scientist II uses technology to measure the length
of the sound wave and calculates how fast it must be
traveling. Which scientist is using the correct method?
A. Scientist I because speed is measured in time and
distance.
B. Scientist II because technology makes measurements
more accurate.
C. Both are because there are many ways to a answer
scientific questions.
D. Neither, the speed of sound varies from one place to
another.
$800
D.
Which of the following is a way science has
affected the ability of people to sense sound?
A.
made telescopes possible
B.
designed glasses
C.
invented sonar image sensing
D.
developed hearing aids
$1000
D.
Benjamin Franklin was an important figure in the early
politics of the United States and the first U.S. postmaster.
He was interested in electricity and did important
experiments with lightning. What does the life of Ben
Franklin show about science?
A. the United States is a land of opportunity
B. politicians and postmasters have the same training as
scientists
C. electricity was scientifically easy to understand
D. non-scientists can make important contributions to
science
$200
D. increase the distance between them
Which of the above tuning forks will generate
the lowest pitch?
A.
A
B.
B
C.
C
D.
D
$400
D.
hat would need to be done to this glass in order to
lower the pitch?
A.
Narrow the mouth of the glass
B.
Widen the mouth of the glass
C.
Raise the level of water
D.
Lower the level of water
$600
B.
Which of these explains why you see the explosion
then hear the boom of fireworks?
A. sound waves travel faster in air than light
waves
B. light waves travel faster in air than sound
waves
C. the explosion produces the light wave before it
produces the sound wave
D. the explosion produces the sound wave before
it produces the light wave
$800
D.
Which of these describes the movement of the
medium from a sound wave?
A. side to side perpendicular to the direction
of the wave
B. rolling motion parallel to the direction of
the wave
C. it depends on the particular medium
D. forward and backward parallel to the
direction of the wave
Daily Double! $2000
C.
Two students wish to measure the speed of sound in water.
They go to one end of a swimming pool and strike a bell
with a hammer underwater. They time how long it takes for
the sound to reach the other end of the pool. This table
shows their data: Why did the students do 10 trials instead
of 1?
A.
B.
C.
D.
their experiment was not well designed.
all scientific tests must be done at least 10 times.
when more tests are done, the data are more trustworthy.
the speed of sound varies when waves go through the water.
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A.
What change would make wave A look more like wave B?
A.
decrease the amplitude
B.
increase the amplitude
C.
decrease the frequency
D.
increase the frequency
$400
D.
Study the drawings above. If these represent
three electromagnetic (light) waves, how could
you make wave A look more like wave C?
A. decrease the amplitude
B. increase the amplitude
C. decrease the frequency
D. increase the frequency
$600
B.
How are wave A and wave C similar?
A.
both have the same frequency
B.
both have the same amplitude
C.
both have the same wavelength
D.
wave C has half the amplitude of wave A
$800
B.
What would wave D look like if you increased its
frequency?
A.
A
B.
B
C.
C
D.
D
$1000
D.
Study the drawings above. If these represent three
electromagnetic (light) waves, how could you make
wave A look more like wave C?
A.
B.
C.
D.
decrease the amplitude
increase the amplitude
decrease the frequency
increase the frequency.
$200
C.
Suppose there is an iron pipe that is 3 miles long. It
follows the base of a hill so that one end cannot be
seen from the other end of the pipe.
If you are standing on one end of the pipe, and there
is an explosion at the other end of the pipe, how
would you first find out about the explosion?
A. you hear the noise of the explosion
B. another worker phones you on his cell
phone
C. you feel the vibrations in the pipe
D. you see smoke rising from the blast
$400
B.
Which of these is an example of how energy spreads
from an energy-producing source?
A.
a glass of water spilled on the floor
B.
light from a candle
C.
a laser beam reflected by a mirror
D.
a flame burning a piece of paper
$600
D.
Which of these best describes how energy spreads
from an energy-producing source?
A.
like dominoes falling in a line
B. like a boulder rolling down a hill, going faster
and faster
C. like rings of water coming from a rock dropped
in water
D.
like layers of an onion from the center going out
$800
B.
Identify the energy change that takes place in a
food blender.
A.
Mechanical to electric energy
B.
Electric to mechanical energy
C.
Electric to heat energy
D.
Chemical to heat energy
E.
Chemical to electric energy
$1000
A.
What energy transformation occurs when an electric
lamp is turned on?
A.
B.
C.
D.
electrical energy to light and heat energy
light energy to electrical and mechanical energy
heat energy to electrical and light energy
electrical energy to mechanical and heat energy