Practice Quiz

NAEP Science Grade 12 - Question List

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46.
Before using a pH meter to determine the pH of a water sample, it is important to do which of the following to ensure the resulting reading will be accurate?
  1. The sample should be refrigerated in a sealed container.
  2. The meter should be calibrated with a buffer solution.
  3. The sample should be filtered to remove any organic matter.
  4. The meter should be allowed to warm up.
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47.
Following an outdoor field trip, a student reports to the teacher that he has a tick imbedded in his skin. The appropriate procedure for the teacher to follow upon discovering the imbedded tick is to:
  1. Have the student call his parents to inform them that he has possibly contracted Lyme disease.
  2. Leave the tick alone and inform the student that he needs to visit his doctor as soon as possible.
  3. Have the school nurse remove the tick from the student immediately and save it for identification.
  4. Encourage the student to remove the tick himself and report the matter to his parents.
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48.
In 1965, two researchers detected cosmic background radiation coming from all directions in space. This discovery provided the first direct evidence of the:
  1. Earliest formation and expansion of the universe.
  2. Presence of black holes at the center of the Milky Way galaxy.
  3. Massive size and homogeneity of the universe.
  4. Bending of light by large gravitational fields.
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49.
When Alfred Wegener proposed that the continents had changed position over time, many scientists rejected his proposal even though some of the evidence he presented was compelling. Which of the following describes the primary scientific reason many geologists originally rejected Wegener's continental drift proposal?
  1. He was trained in a different scientific discipline and was considered an amateur.
  2. His hypothesis lacked a convincing mechanism to explain what forces moved the continents.
  3. He did not defend and argue the merits of his ideas since the evidence was strong.
  4. His field work was poorly executed and lacked the rigor associated with most sciences of the day.
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50.
The significant increase of which of the following interactions between Earth systems has the greatest potential to indirectly cause a rise in sea level?
  1. Deforestation of tropical regions, reducing carbon sequestration by the biosphere.
  2. Pollution of coastal waters with agricultural runoff, triggering algal blooms.
  3. Eruption of low-latitude volcanoes, producing a change in atmospheric chemistry.
  4. Desertification of semi-arid lands, generating wind-blown dust in the troposphere.
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