Practice Quiz

ACT Science Exam Prep - Question List

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36. The distance of the star Vega from Earth is 1.6 million times greater than the distance of the Sun from Earth. Which of the following best describes the gravitational influence of Vega on Earth?
  1. It is roughly equal to that of the Sun.
  2. Its influence is greater than that of the Sun.
  3. Its influence is small because of its distance.
  4. It influences the magnitude of Earth’s mass.
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37. Which of the following is the correct molecular formula for hydrobromic acid?
  1. HBrO
  2. HBr
  3. H2Br
  4. H2OBr
  5. H2O2Br
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38. A boat tied to a dock is stationary. Water waves constantly pass by the boat. The crests of the waves are 3 m apart and a crest passes the front of the boat every 4 s.What is the velocity of the waves?
  1. 0.75 m/s
  2. 1.33 m/s
  3. 3 m/s
  4. 12 m/s
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39. Which of the following elements is most easily oxidized?
  1. Nitrogen
  2. Fluorine
  3. Lithium
  4. Neon
  5. Sulfur
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40. People perceive sound differently in air than they do under water. Which of the following correctly compares the motion of sound waves in air and in water?
  1. Sound waves travel faster in air than in water.
  2. Sound waves travel slower in air than in water.
  3. Sound waves travel in air but do not travel in water.
  4. Sound waves travel at the same speed in air and in water.
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