Practice Quiz

NAEP Science Grade 12 - Question List

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1. If the Sun were twice as far away from Earth as it is now, what would happen to the strength of the gravitational force between the Sun and Earth?
  1. It would be the same strength as it is now.
  2. It would be two times as strong as it is now.
  3. It would be one-half as strong as it is now.
  4. It would be one-fourth as strong as it is now.
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2. When a cork is added to a glass of water, the cork floats at the top of the water instead of sinking to the bottom of the glass. Which statement helps explain why this happens?
  1. The cork absorbs the water, so it cannot sink.
  2. The water is exerting an upward force on the cork.
  3. The water stops the force of gravity from acting on the cork.
  4. The density of the cork is greater than that of the water.
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3. What two gases make up most of the Earth's atmosphere?
  1. Hydrogen and oxygen
  2. Hydrogen and nitrogen
  3. Oxygen and carbon dioxide
  4. Oxygen and nitrogen
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4. A radio transmitter broadcasts a signal at a given frequency. If the broadcast frequency is increased, what happens to the speed and the wavelength of the radio waves?Speed Wavelength

  1. Increases Decreases
  2. Increases Increases
  3. Remains the same Decreases
  4. Remains the same Increases
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5. ... C 3H 6 + ... O 2 ... CO 2 + ... H 2OWhen the equation above is balanced and all coefficients are reduced to their lowest whole-number values, the coefficient for H 2O is
  1. 2
  2. 3
  3. 4
  4. 6
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