Practice Quiz

ACT Science Exam Prep - Question List

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16. When the moon appears to be dark in a clear sky, it is at which stage?
  1. Full moon
  2. Waxing moon
  3. Waning crescent
  4. New moon
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17. A car with its horn sounding approaches a group of students. Assume the car’s horn produces sound waves with a constant frequency. Which of the following statements best explains why the students hear a higher pitch as the car approaches than when it is stopped?
  1. The sound waves increase in speed as the car approaches the students.
  2. The sound waves decrease in speed as the car approaches the students.
  3. The sound waves are heard at a lower frequency as the car approaches the students.
  4. The sound waves are heard at a higher frequency as the car approaches the students.
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18. In regard to genetics, which of the following would describe a poodle whose parents were both 100% poodle?
  1. A miniature poodle
  2. A standard poodle
  3. A hybrid
  4. A purebred
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19. A large container of cold water is moved from a refrigerator to a table. A hot piece of metal is placed into the water. Which of the following best describes the final temperature of the metal?
  1. higher than the final temperature of the water
  2. the same as the final temperature of the water
  3. lower than the initial temperature of the water
  4. the same as the initial temperature of the water
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20. What happens when an element moves from one physical state to another?
  1. Its chemical state changes.
  2. Its chemical state remains the same.
  3. Its molecular state changes.
  4. It gets a new symbol on the periodic table.
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