Obtain, evaluate, and communicate information about the law of conservation of energy to develop arguments that energy can transform from one form to another within a system.
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Q 1/30
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Which of the following best describes the law of conservation of energy?
30
Energy can be created from nothing.
Energy can only be stored, not transformed.
Energy cannot be created or destroyed, only transformed from one form to another.
Energy is always lost in transformations.
Q 2/30
Score 0
A girl is standing at the top of a slide before she moves. As she slides down, her potential energy decreases. According to the law of conservation of energy, what is happening to that energy?
30
The potential energy is being converted into new matter within the girl\'s body.
The potential energy is being destroyed as she reaches the bottom of the slide.
The potential energy is disappearing because gravity is using it up to pull her.
The potential energy is being transformed into kinetic energy and heat energy.
30 questions
Q.
Which of the following best describes the law of conservation of energy?
1
30 sec
S8P2
Q.
A girl is standing at the top of a slide before she moves. As she slides down, her potential energy decreases. According to the law of conservation of energy, what is happening to that energy?
2
30 sec
S8P2
Q.
When a toaster is plugged into a wall outlet and turned on, it converts electrical energy into thermal energy to toast bread. How does this process demonstrate the law of conservation of energy?
3
30 sec
S8P2
Q.
A battery-powered flashlight is turned on, converting chemical energy from the batteries into light and heat. Which statement best explains this transformation in terms of the law of conservation of energy?
4
30 sec
S8P2
Q.
A pendulum swings back and forth. At the highest point of its swing, it has the most potential energy, and at the lowest point, it has the most kinetic energy. What does this tell us about the energy in the system?
5
30 sec
S8P2
Q.
A roller coaster car is pulled to the top of a tall hill and then released. As it speeds down the track, what happens to the energy within the system?
6
30 sec
S8P2
Q.
Which of the following describes the energy transformation that occurs when a person rubs their hands together rapidly to get warm?
7
30 sec
S8P2
Q.
A toy car is pushed across a floor and eventually comes to a stop. According to the law of conservation of energy, what happened to the kinetic energy the car had while it was moving?
8
30 sec
S8P2
Q.
An electric fan is plugged into an outlet and turned on. Which statement best represents the law of conservation of energy in this system?
9
30 sec
S8P2
Q.
A student drops a basketball from a height of 2 meters. As the ball falls toward the ground, which statement best describes the energy transformation taking place?
10
30 sec
S8P2
Q.
Which of the following is an example of energy transforming from one form to another?
11
30 sec
S8P2
Q.
If a ball is rolling down a hill and eventually stops at the bottom, which statement best describes what happened to its energy according to the law of conservation of energy?
12
30 sec
S8P2
Q.
13
30 sec
S8P2
Q.
A battery-powered flashlight transforms energy to produce a beam of light. According to the law of conservation of energy, what happens to the chemical energy stored in the batteries?
14
30 sec
S8P2
Q.
Which of the following occurs when a person rubs their hands together quickly to stay warm?
15
30 sec
S8P2
Q.
An electric motor is used to pull a heavy box across the floor. How does this system demonstrate the law of conservation of energy?
16
30 sec
S8P2
Q.
A roller coaster car is at the very top of a tall hill, paused for a split second before dropping. Which statement best describes the energy of the car at this moment?
17
30 sec
S8P2
Q.
A student uses a hand-crank generator to power a small light bulb. Which energy transformation is taking place within this system?
18
30 sec
S8P2
Q.
When a person eats food and then goes for a run, which energy transformation is primarily occurring within the body?
19
30 sec
S8P2
Q.
When a person strikes a match against a rough surface, the friction causes the match to ignite. Which energy transformation is happening in this system?
20
30 sec
S8P2
Q.
What does the law of conservation of energy state?
21
30 sec
S8P2
Q.
Which of these best describes the energy transformation that happens when a battery-powered flashlight is turned on?
22
30 sec
S8P2
Q.
A roller coaster car sits at the top of a tall hill before it starts moving. According to the law of conservation of energy, what happens as the car speeds down the track?
23
30 sec
S8P2
Q.
Which statement describes what happens to the energy of a bouncing ball when it eventually stops moving on the floor?
24
30 sec
S8P2
Q.
Imagine you are rubbing your hands together on a cold day to get warm. How does the law of conservation of energy explain this?
25
30 sec
S8P2
Q.
An electric fan is plugged into a wall outlet and turned on. Which statement correctly describes the energy transformation taking place?
26
30 sec
S8P2
Q.
27
30 sec
S8P2
Q.
When you use a toaster to brown a piece of bread, what energy transformation is primarily taking place within the system?
28
30 sec
S8P2
Q.
Which of these is the best example of energy being transformed from potential energy into kinetic energy?
29
30 sec
S8P2
Q.
A girl uses a bow and arrow to hit a target. She pulls the string back and holds it for a moment before letting go. Which energy transformation occurs at the moment she releases the string?