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Eighth Grade (Grade 8) Physics Questions

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Grade 8 Waves and Sound
The bending of waves is called                .
  1. refraction
  2. reflection
  3. seismic warping
  4. seismic moment
Grade 8 Forces and Motion
If you use two difference reference points to describe the position of the same item, how will your descriptions differ?
  1. They will always differ in distance.
  2. They will always differ in direction.
  3. They will differ in either distance or direction or both.
  4. They will differ in either distance or direction but not both.
Grade 8 Forces and Motion
If a distance-time graph shows a straight line that has a slope > 0 (it is not horizontal), what must be true about the speed of the object?
  1. It is moving at a constant speed.
  2. It is not moving.
  3. It is slowing down.
  4. It is speeding up.
Grade 8 Waves and Sound
Where do light waves travel the fastest?
  1. in solids
  2. in liquids
  3. in gases
  4. in empty spaces
Grade 8 Forces and Motion
Which of the following is not a type of friction?
  1. fluid
  2. static
  3. rolling
  4. sliding
  5. lifting
Grade 8 Energy and Momentum
Which of the following conditions must be met for work to be done?
  1. A force must be applied.
  2. There must be movement over a distance.
  3. The direction of force and movement must be the same.
  4. All of the above.
Grade 8 Energy and Momentum
Which of these BEST describes the energy transformations in a coal-fired power plant?
  1. Mechanical to Chemical to Electrical to Thermal
  2. Electrical to Chemical to Mechanical to Thermal
  3. Thermal to Chemical to Electrical to Mechanical
  4. Chemical to Thermal to Mechanical to Electrical
Grade 8 Energy and Momentum
A woman holds a 400 N weight 2 meters above the ground. How much work is being done?
  1. 0 Joules
  2. 800 Joules
  3. 200 Joules
  4. 3200 Joules
Grade 8 Waves and Sound
Describe the Law of Reflection.
Grade 8 Waves and Sound
The frequency of a Gamma Ray is                                   Hz.
  1. less than 32 to the power of 4
  2. 3.14159265359 (pi)
  3. greater than 10 to the power of 19
  4. exactly 1,239.7648
Grade 8 Waves and Sound
What is an example of reflection?
  1. A sound wave spreads out to travel around a corner
  2. An echo
  3. A straw appears bent in water
  4. None of the above
Grade 8 Fluid Mechanics
Draw the Graph for Charles's Law.
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