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Eighth Grade (Grade 8) Science Questions

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Grade 8 Physics
How does polarization contribute to static discharge?
  1. By preventing the buildup of charges
  2. By increasing the conductivity of objects
  3. By facilitating the movement of charges
  4. By neutralizing the electric fields
Grade 8 Physics
What is the primary role of polarization in static electricity?
  1. To generate electric fields
  2. To create an imbalance of charges
  3. To facilitate the flow of current
  4. To eliminate static discharge
Grade 8 Atmosphere
Which is the most common type of barometer?
  1. aneroid
  2. mercury
Grade 8 Scientific Methods and Applications
How do we adjust our body position when carrying a heavy load?
  1. We shift the center of mass of the load away from our body's center of mass
  2. We shift the center of mass of the load towards our body's center of mass
  3. We do not adjust our body position
  4. We shift the center of mass of the load to the halfway point
Grade 8 Physics
Which of the following unit is used to measure magnetic fields?
  1. Newtons (N)
  2. Joules (J)
  3. Tesla (T)
  4. Watts (W)
Grade 8 Scientific Methods and Applications
What is the key to achieving balance in sports like gymnastics and figure skating?
  1. The ability to perform complex maneuvers
  2. The ability to maintain balance without shifting the center of mass
  3. The ability to maintain balance only when stationary
  4. The ability to shift the center of mass while maintaining control over movements
Grade 8 Scientific Methods and Applications
Why does a pencil topple over when held vertically?
  1. The center of mass is located near its tip
  2. The center of mass is located near its eraser
  3. The center of mass is located at the halfway point
  4. The center of mass is located in the air
Grade 8 Scientific Methods and Applications
What is the center of mass?
  1. The point at which all the mass of an object is concentrated
  2. The point where an object is suspended from
  3. The halfway point of an object
  4. The point where an object loses its balance
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