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Eighth Grade (Grade 8) Energy and Momentum Questions

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Grade 8 Energy and Momentum
Any energy that is stored is called                 energy.
  1. kinetic
  2. cooking
  3. potential
  4. thermal
  5. sound
  6. electrochemical
Grade 8 Energy and Momentum
The energy of matter in motion is                .
  1. electromagnetic
  2. potential
  3. chemical
  4. kinetic
Grade 8 Energy and Momentum
The movement of molecules in matter is                 energy.
  1. chemical
  2. thermal
  3. electromagnetic
  4. electrical
Grade 8 Energy and Momentum
The unit for measuring energy is                .
  1. Degrees
  2. Newtons
  3. Joules
  4. Watts
Grade 8 Energy and Momentum
As a pendulum swings back and forth,
  1. potential energy is transformed into kinetic energy.
  2. kinetic energy is transformed into potential energy.
  3. at the lowest part of its swing, its energy is all kinetic.
  4. at the end points of its swing, its energy is all potential.
  5. all of the above.
Grade 8 Energy and Momentum
Kinetic energy of an object is equal to what?
  1. one half the product of its mass and speed squared.
  2. one half the product of its mass and its speed.
  3. its mass multiplied by its speed.
Grade 8 Energy and Momentum
Microwaves, radio waves, and X-rays are all examples of what kind of energy?
  1. Mechanical
  2. Thermal
  3. Electromagnetic
  4. Sound
Grade 8 Energy and Momentum
Why is it more efficient to move a box up a ramp on wheels than sliding it?
  1. The wheels reduce the pull of gravity.
  2. Rolling friction is weaker than sliding friction, so you lose less work.
  3. Wheels increase the normal force on a box.
  4. None of the above
Grade 8 Energy and Momentum
Which of the following best describes the concept of work?
  1. a force applied to an object
  2. a force moves an object through a distance
  3. the transformation of energy
  4. the rate at which energy is transformed
Grade 8 Energy and Momentum
The energy obtained from the digestion of food is called                .
  1. heat
  2. nuclear
  3. mechanical
  4. chemical
Grade 8 Energy and Momentum
Which statement correctly compares the potential energy of the balls?
Potential Energy
  1. C has more potential energy than B.
  2. E has more potential energy than F.
  3. D has less potential energy than E.
  4. B has less potential energy than A.
Grade 8 Energy and Momentum
Electrons flowing along a copper wire is an example of what type of energy?
  1. Thermal
  2. Radiant
  3. Electrical
  4. Mechanical
Grade 8 Energy and Momentum
The ratio of work to time, or the rate of work, is known as                     .
  1. force
  2. mechanical advantage
  3. efficiency
  4. power
Grade 8 Energy and Momentum
Which statement is true about the potential energy of the ball at E and F?
Potential Energy
  1. The potential energy at both E and F is 0 joules.
  2. The potential energy at both E and F is greater than 0 joules.
  3. The potential energy at F is 0 joules and at E is greater than 0 joules.
  4. The potential energy at E is 0 joules and at F is greater than 0 joules.
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