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Law Of Conservation Of Energy
Test Description: Law of Conservation of Energy
Instructions: Answer all questions to get your test result.
1) As the cars of a rollercoaster race down a hill, energy transformations take place. Which of the following is true?
A
The kinetic energy of the cars is equal to the potential energy of the cars.
B
Some energy is destroyed as the car slows down.
C
Kinetic energy is stored in the cars as they move downhill.
D
Some potential energy is transformed to kinetic energy and other forms of energy.
2) What cannot happen to energy according to the law of conservation of energy?
A
Energy cannot be changed.
B
Energy cannot be created
C
Energy cannot be transformed.
D
Energy cannot be converted.
3) Energy cannot be created or destroyed. Which statement about energy is correct?
A
Conservation of energy occurs only when some of the energy is converted to light.
B
A little energy is lost every time an energy transformation occurs.
C
Energy can change form, but energy can never change in total amount.
D
Because of the conservation of energy, it is possible to have a machine that would never need energy.
4) The following equation illustrates the chemical reaction that occurs in a plant. Water + carbon dioxide + light energy to sugar + oxygen. Based on the law of conservation of energy, what happened to the light energy in the reaction?
A
It was produced by the plant.
B
It was changed into oxygen gas.
C
It was converted into chemical energy stored in the sugar.
D
It was destroyed.
5) Friction is a force that opposes motion. When friction is present, heat is usually generated. According to the law of conservation of energy, which of the following statements is true about the energy associated with friction?
A
It was not transformed from another type of energy
B
Energy is created with friction.
C
The law of conservation of energy does not apply.
D
Some of the energy is converted into thermal energy.
6) Which of the following would BEST demonstrates how energy behaves?
A
Annabelle performed an experiment where she dropped a tennis ball 35 times and counted the number of bounces .
B
Cameron performed an experiment in which he kept ice from melting for 1 hour.
C
Isaiah performed an experiment where he heated 40 g of ice cubes until they changed state to a gas.
D
Kendra performed an experiment to demonstrate friction by rubbing her hands together for 50 seconds. She noticed her hands be
7) Which statement BEST explains why a bouncing basketball will not remain in motion forever?
A
The energy is used up and destroyed.
B
The energy is transferred to light and potential energy.
C
The energy is transferred to heat and chemical energy.
D
The energy is transferred to sound and heat energy.
8) The unit for energy is the joule (J). If the energy content of an object is 1,000 J, but then later it is found to be 900 J, what happened to 100 J of its energy?
A
The object absorbed additional energy from its surroundings.
B
Energy was destroyed.
C
Energy was created.
D
The object transferred some of its energy to its surroundings.
9) Larissa is a very energetic person and has a hard time sitting still in class. One time in math class, her teacher asked Larissa where she got all of her energy. Since Larissa had just studied energy in science class, she knew the correct answer. Wha
A
“I make energy whenever I need it.”
B
“I create it!”
C
“I just transform it.”
D
“I can get energy anywhere I want.”
10) Energy cannot be created nor destroyed, only changed from one form to another. How does listening to music on a radio obey the law of conservation of energy?
A
Electrical energy is converted into other forms of energy, such as sound.
B
Electrical energy remains unchanged.
C
Sound energy is changed into potential energy.
D
Electrical energy is gradually destroyed as the radio plays.
*select an answer for all questions
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