Practice Quiz

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

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51.
Which of the following is a major challenge for climate researchers trying to establish the effect that human activities have had on global climate?
  1. Determining the effect that water vapor generated from natural sources has had on climate change.
  2. Compiling the evidence of climate change from different countries with a variety of concerns and priorities.
  3. Measuring the subtle changes in the environment that have occurred as the global climate has warmed.
  4. Distinguishing what shifts in the climate system might be exclusively due to natural long• term changes.
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52.
Which of the following is an effective way to reduce the acid precipitation resulting from power plant emissions?
  1. Reacting sulfur dioxide with calcium hydroxide by forcing exhaust through a spray of lime and water.
  2. Filtering the dust particles generated by the breakdown of coal through fine mesh filtration systems.
  3. Converting carbon monoxide to carbon dioxide with smokestack catalytic converters.
  4. Removing volatile hydrocarbon compounds found in coal before the fuel is burned.
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53.
The distinguishing characteristic of the atmospheric pollutant known as particulate matter is that it comprises:
  1. Acidic liquids and gases generated by fixed sources.
  2. Fragments of natural substances visible to the unaided eye.
  3. Droplets and solids small enough to be suspended in the air.
  4. Heat-trapping chemicals that absorb infrared energy.
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54.
Climatologists have used computer models to investigate possible consequences of increased average global temperatures on various Earth systems. According to the models, which of the following changes in an Earth system is likely to occur in association with an increase in average global temperatures? 
  1. Regions prone to drought will become drier, due to longer periods without adequate rainfall.
  2. Jet stream winds will shift position more frequently, causing rapid changes in weather conditions.
  3. Hurricanes will become less common in tropical areas, due to a strengthening of the Coriolis effect.
  4. El Niño events will occur at longer intervals, causing anomalous weather conditions to last longer.
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55.
The psychrometer is based on which of the following principles?
  1. Relative humidity can be calculated by comparing the evaporative cooling that occurs in a particular location to the air temperature.
  2. The apparent temperature can be determined by comparing the actual temperature in a location with the relative humidity.
  3. The density of an air mass can be calculated by comparing the molecular weight of dry air to the molecular weight of the actual air.
  4. The adiabatic cooling of an air mass can be determined by comparing the actual pressure in a location to the theoretical sea-level pressure.
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