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Eighth Grade (Grade 8) Physics Questions

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Grade 8 Forces and Motion

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When is an object in motion?
  1. when its distance from another object is changing
  2. when the point of reference remains the same
  3. only if the object is rolling
  4. if the object has forces acting on it
Grade 8 Forces and Motion
Which of the following is a contact force?
  1. normal force
  2. magnetism
  3. nuclear
  4. gravity
Grade 8 Waves and Sound
The distance between one crest and the other is what?
  1. wavelength
  2. speed
  3. frequency
  4. amplitude
Grade 8 Energy and Momentum
                is the rate at which work is done.
  1. Work
  2. Power
  3. Force
  4. Speed
Grade 8 Forces and Motion
The strength of the force of gravity between two objects depends on
  1. only the shapes of the objects.
  2. only the masses of the objects.
  3. only the distance between the objects.
  4. both the masses of the objects and the distance between them.
Grade 8 Simple Machines
Which of the following ALWAYS increases your force?
  1. Type 1 lever
  2. Type 2 lever
  3. Type 3 lever
  4. Type 4 lever
Grade 8 Fluid Mechanics
Which property of a liquid describes its resistance to flow?
  1. plasticity
  2. viscosity
  3. elasticity
  4. incompressibility
Grade 8 Waves and Sound
Which of the following determines the intensity of sound?
  1. wavelength and frequency
  2. amplitude and frequency
  3. amplitude and distance
  4. wavelength and distance
Grade 8 Heat Transfer
Sample 1 has 500 grams of sodium at a temperature of 25 degrees Celsius. Sample 2 has 100 grams of sodium at a temperature of 25 degrees Celsius. What is true about the thermal energy of the two samples?
  1. Sample 1 has more thermal energy.
  2. Sample 2 has more thermal energy.
  3. Samples 1 and 2 have equal amounts of thermal energy.
  4. None of the above.
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