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Eighth Grade (Grade 8) Physics Questions

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Grade 8 Waves and Sound
What is a wave?
  1. a vibration that transfers energy
  2. disturbance that transfers energy from every place
  3. energy disturbance
  4. a disturbance in water
Grade 8 Forces and Motion
What does a car's speedometer measure?
  1. Speed
  2. Velocity
  3. Both
Grade 8 Energy and Momentum
Give 3 examples of mechanical energy.
Grade 8 Forces and Motion
How often does the tip of an hour hand on a clock have the same velocity?
  1. once every minute
  2. once every hour
  3. once every 12 hours
  4. once every 24 hours
Grade 8 Forces and Motion
What is a push or pull that acts on an object?
  1. weight
  2. mass
  3. force
  4. meter
Grade 8 Forces and Motion
Newton's law of universal gravitation states that
  1. every object in the universe attracts every other object.
  2. an object at rest will stay at rest, and an object in motion will stay in motion.
  3. the less mass an object has, the greater its inertia.
  4. only large planets have gravity.
Grade 8 Magnetism and Electricity
                    is nature's most powerful display of static electricity.
  1. Current electricity
  2. Lightning
  3. Conduction
  4. Induction
Grade 8 Waves and Sound
In space, Gamma Rays are created by                           .
  1. supernovae (stars dying)
  2. regions around black holes
  3. neutron stars
  4. all of the above
Grade 8 Simple Machines
A wheelbarrow, pulley, and wedge are all examples of what?
  1. levers
  2. inclined planes
  3. simple machines
  4. wheels and axles
Grade 8 Heat Transfer
How does the energy and motion of particles change as a substance is heated?
  1. They gain more energy but less speed.
  2. They gain more energy and more speed.
  3. They slow down.
  4. They gain speed, collide more, both with each other and the walls of the container which causes expansion and temperature rise.
Grade 8 Waves and Sound
On Earth, Gamma Rays are created by                .
  1. lightning
  2. cars
  3. computers
  4. talking
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