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Eighth Grade (Grade 8) Science Questions

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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
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 Forces and Motion
What is tension?
  1. a force that comes when you are stressed
  2. a force that presses or squeezes something together
  3. a force that acts to expand or lengthen the thing it is acting on
Grade 8 Space Exploration
Match the following terms to their corresponding definition.
__ Energy due to temperature A. Wien’s law of radiation
__ Theoretical perfect radiator B. Radiation spectrum
__ A wavelength is inversely proportional to its temperature C. Blackbody
__ Shows how much energy a body radiates at different wavelengths D. Astronomical observatory
__ A place equipped for the observation of sky objects E. Thermal radiation
Grade 8 Inner Planets
If astronomers fond galaxies that weren't experiencing redshift, this would mean what?
  1. Those galaxies were moving slower than other galaxies.
  2. Those galaxies were not moving away from us.
  3. Those galaxies were moving faster than other galaxies.
  4. None of the above.
Grade 8 Physics
If the velocity of a body is doubled its kinetic energy                 .
  1. becomes double
  2. becomes half
  3. becomes 4 times
  4. remains the same
Grade 8 Physics
Which one of the following does not possess kinetic energy?
  1. a flying bird
  2. a running child
  3. a stationary bicycle
  4. a moving ball
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