Practice Quiz

Praxis II Middle School Content Knowledge Test Prep - Question List

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76. Which of the following devices relies on electromagnetic radiation in the radio wave region of the spectrum for operation?
  1. sun tanning lamp
  2. electric light bulb
  3. cellular telephone
  4. electric toaster
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77. One 7.0 kg bowling ball is lifted to a storage shelf 1.0 m above the fl oor. A second 7.0 kg ball is lifted to a storage shelf 2.0 m above the fl oor.

Which of the following best explains why the measured force of gravity on each ball is nearly identical?
  1. The final potential energy of each ball increased.
  2. The amount of work required to lift each ball is identical.
  3. The distance of each ball from Earth’s center of mass is almost identical.
  4. The gravitational force of each ball on the other cancels out the force of Earth’s gravity.
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78. Which of the following describes the mechanical energy of a cart at rest at the top of a steep hill?
  1. The cart has no mechanical energy.
  2. The cart’s mechanical energy is all kinetic.
  3. The cart’s mechanical energy is all potential.
  4. The cart’s mechanical energy is half potential and half kinetic.
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79. Two blocks of zinc with different masses are at room temperature. Each block then absorbs the same amount of heat over 10 minutes. When the temperature of each block is then measured, block 1 is at a higher temperature than block 2.

Which of the following statements most likely describes the zinc blocks?
  1. The mass of block 1 is less than the mass of block 2.
  2. The mass of block 1 is greater than the mass of block 2.
  3. The specific heat of block 1 is less than the specific heat of
    block 2.
  4. The specific heat of block 1 is greater than the specific heat of block 2.
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80. A 5 kg rock and a 10 kg rock are dropped from a height of 10 m. Which of the following statements describes what happens to the potential energy of the rocks?
  1. Neither rock loses potential energy because no work is done on the rocks.
  2. Both rocks lose the same amount of potential energy because they fall from the same height.
  3. The 10 kg rock loses more potential energy than the 5 kg rock because the 10 kg rock falls faster.
  4. The 10 kg rock loses more potential energy than the 5 kg rock because the 10 kg rock has more mass.
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