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Ninth Grade (Grade 9) Physics Questions

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Grade 9 Heat Transfer
The conversion of a vapor directly to solid is best described as
  1. condensation.
  2. deposition.
  3. freezing.
  4. vaporization.
Grade 9 Fluid Mechanics
A large truck passes a car on the highway. According to Bernoulli's principle, which of the following should occur?
  1. Pressure decreases between the vehicles, so the car and truck move slightly apart.
  2. Pressure decreases between the vehicles, so the car and truck move slightly together.
  3. Pressure increases between the vehicles, so the car and truck move slightly apart.
  4. Pressure increases between the vehicles, so the car and truck move slightly together.
Grade 9 Physics
Which law states that a falling object will fall at an even speed, regardless of weight?
  1. Laws of the Pendulum
  2. 3 Laws of Planetary Motion
  3. Law of Uniform Acceleration
  4. 3 Laws of Motion
Grade 9 Heat Transfer
A refrigerant in a cooling system cools the surrounding air                 .
  1. as it evaporates
  2. as it condenses
  3. both
  4. neither
Grade 9 Heat Transfer
A metal is a good conductor of heat.
  1. True
  2. False
Grade 9 Fluid Mechanics
Two tall buildings are separated by a narrow alleyway. On a windy day, wind gusts move very quickly through the alley. If the buildings are not constructed properly, which of the following could be a concern when this occurs?
  1. The buildings' windows could be blown outward into the alley because of air pressure differences.
  2. The buildings' windows could be blown inward into the building because of air pressure differences.
  3. The buildings' windows could be blown outward into the alley because of temperature differences.
  4. The buildings' windows could be blown inward into the building because of temperature differences.
Grade 9 Waves and Sound
The line from the point of incidence at 90 degrees to the optical device is the
  1. reflecting surface.
  2. normal.
  3. angle of reflection.
  4. none of the above.
Grade 9 Heat Transfer
Which law of thermodynamics states that two systems in equilibrium with a third system are also in equilibrium with each other?
  1. Zeroth law of thermodynamics
  2. First law of thermodynamics
  3. Second law of thermodynamics
  4. Third law of thermodynamics
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