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Eighth Grade (Grade 8) Science Questions

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Grade 8 Physics
Helium-4 nuclei atoms are identical to the                .
  1. alpha particles
  2. beta particles
  3. gamma particles
  4. delta particles
Grade 8 Physics
Speed is a measure of how fast something is moving. Which of the following is the unit of speed?
  1. meter per second
  2. kilometer per hour
  3. miles per hour
  4. all of the above
Grade 8 Physics
Which one of the following quantities is not a vector quantity?
  1. mole of a substance
  2. displacement
  3. pressure
  4. velocity
Grade 8 Physics
If the speed of the object decreases, which of the following statement is true?
  1. the object decelerates
  2. the object has positive acceleration
  3. the object has zero acceleration
  4. the object has a constant velocity
Grade 8 Physics
If the motion of the object is rectilinear, what happens with the velocity of the object?
  1. The velocity of the object remains constant.
  2. The velocity of the object increases.
  3. The velocity of the object decreases.
  4. The velocity of the object becomes zero.
Grade 8 Physics
The distorted motion of a body is known as                           .
  1. vibratory motion
  2. random motion
  3. circular motion
  4. vibratory and translational
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