Practice Quiz

Praxis II General Science: Content Knowledge Exam Prep - Question List

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101.
Media accounts of major hurricanes often mention a growing concern that global warming will increase the frequency of major hurricanes affecting the United States. Most climatologists are uncomfortable with this kind of statement from the media primarily because it is: 
  1. A generalization that does not accurately reflect the complexity of research on the topic.
  2. An unsubstantiated rumor without any support in the broader scientific community.
  3. A government issue that only official agencies should address to avoid unnecessarily scaring the public.
  4. An unethical strategy for selling news that may cause disruption to the larger economy.
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102.
The development and marketing of new technologies have often been done without understanding the long-term consequences that adopting such technologies may have on society. The most serious example of a technology that ultimately had a major effect on human health and the environment was the introduction and use of:
  1. Radioactive isotopes for tracing the location of diseased tissue.
  2. Chlorofluorocarbons for air-conditioning.
  3. Lithium-ion batteries for powering digital devices.
  4. Electromagnetic waves for sending data across great distances.
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103.
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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104.
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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105.
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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