Practice Quiz

NAEP Science Grade 12 - Question List

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121.
Which of the following supported the scientific conclusion that the universe began with an inflationary expansion?
  1. The proportion of the different elements found in asteroids.
  2. The motion of galaxies receding from Earth in all directions.
  3. The variation in the density of different regions of space.
  4. The release of energy observed in nuclear fusion reactions.
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122.
Which of the following provides evidence that the universe is expanding?
  1. The changing distance between stars in the Milky Way.
  2. The calculated distance to the cosmic horizon.
  3. The shifting of the spectral lines of galaxies.
  4. The emptiness of most regions of space.
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123.
Formulating a testable hypothesis is particularly important when:
  1. Determining cause and effect relationships between observable phenomena.
  2. Interpreting a model that can be used to describe the workings of a natural system.
  3. Explaining the interactions of all natural phenomena in terms of a few basic laws.
  4. Describing as many characteristics as possible of living and nonliving things.
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124.
Which of the following best describes the importance of having a control group in an experiment?
  1. Insuring reproducibility of the results.
  2. Facilitating the peer review process.
  3. Reducing potential bias by the observer.
  4. Isolating the effect of a single variable.
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125.
A scientist planning to survey the characteristics of individuals in a particular plant population is careful to choose methods that guarantee random selection of the individuals to be measured. This randomization will:
  1. Reduce potential bias in the results.
  2. Increase the statistical significance of the results.
  3. Ensure reproducibility of the results.
  4. Provide a sufficient number of samples in the results.
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