Jeopardy! 8th Grade- Physics: Energy

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Final JeopardyA. 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

$200C.

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.

$400C.

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.

$600A.

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

$800B.

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

$200B. 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

$400B. 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

$600C. Position 3

Where is potential energy the greatest?

A.Position 1

B.Position 2

C.Position 3

D.Position 4

$800C. 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

$1000B.

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

$200D. increase the distance between them

Which of the above tuning forks will generate the lowest pitch?

A. A

B. B

C. C

D. D

$400D.

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

$600C.

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

$1000D.

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

$200D. increase the distance between them

Which of the above tuning forks will generate the lowest pitch?

A. A

B. B

C. C

D. D

$400D.

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

$600B.

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

$800D.

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! $2000C.

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. their experiment was not well designed. B. all scientific tests must be done at least 10 times. C. when more tests are done, the data are more trustworthy. D. the speed of sound varies when waves go through the water.

$200A.

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

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

$400D.

$600B.

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

$800B.

What would wave D look like if you increased its frequency?

A. A

B. B

C. C

D. D

$1000D.

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.

$200C.

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

$400B.

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

$600D.

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

$800B.

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. electrical energy to light and heat energy B. light energy to electrical and mechanical energy C. heat energy to electrical and light energy D. electrical energy to mechanical and heat energy