Energy Benchmark Review Question Preview (ID: 34999)
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Jill wants to model a energy transformation. She holds a book above the floor to give it potential energy. She then drops the book. What energy transformation occurs after she drops the book?
a) It changes from potential to kinetic and back to potential
b) It changes from potential to kinetic to zero energy.
c) It changes from potential to kinetic to sound and thermal
d) It changes from potential to kinetic to elastic
Joey wishes to improve the efficiency of his inclined plane. Which of the changes below will most likely improve the efficiency of his simple machine?
a) Use a longer board to reduce the force.
b) Lower the height to reduce the work.
c) Pour grease on it to reduce the friction.
d) Use less mass to reduce the weight
A student is developing a model to explain how an electric generator works. Which of the following is a way to generate an electrical current?
a) Insert a iron nail in a coil of wire.
b) Heat a coil of wire with coal.
c) Place a coil of wire in a magnetic field.
d) Rotate a coil of wire in a magnetic field.
A student was designing a device to keep ice from melting. Which of the following would work best to minimize heat transfer by radiation?
a) Make the container air tight to stop airflow.
b) Paint the device white to reflect radiant heat.
c) Put it on an insulated surface to prevent direct contact
d) Put it the sunlight to absorb more radiant heat.
A builder made sure that there were no spaces that air could get in around the windows in a new house he was building. He did this so it would be easier to heat and cool the house. What type of heat transfer was he trying to minimize by doing this?
a) convection
b) conduction
c) radiation
d) infrared
What causes a person's hand to become cold when they pick up a glass of ice water?
a) The cold would transfer from the person's hand to the glass
b) The heat energy would transfer from the glass to the person's hand.
c) The cold would transfer from the glass to the person's hand
d) The heat energy would transfer from the person's hand to the glass
When would a roller coaster car have the MOST potential energy?
a) When it is up at its highest point
b) When it is at its lowest point
c) When it is moving the fastest
d) When it gets to the bottom of the biggest hill
A student builds an electric circuit to play a radio. The circuit contains a radio, wires and a hand-held electric generator. When he turns the handle on the generator the radio begins to play. Which best explains how the radio gets electric energy
a) The generator transforms potential energy into electric energy.
b) The generator transforms thermal energy into electric energy.
c) The generator transforms chemical energy into electric energy.
d) The generator transforms kinetic energy into electric energy.
A class was developing a model to explain heat transfer. What is the best way they could describe what happens if a cup of hot water loses heat by radiation?
a) The mass of the water will decease.
b) The thermal energy of the water will increase
c) The water particles will slow down
d) The water particles will evaporate.
Students were asked to design a way to improve the efficiency of a simple machine. What problem would they need to solve?
a) They need to find a way to increase the input work.
b) They need to find a way to increase the output work.
c) They need to find a way to reduce the friction
d) They need to find a way to reduce the weight.
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To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 34999 in the upper right hand corner or click here.
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