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Eighth Grade (Grade 8) Science Questions

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Grade 8 Physics
When an object falls through the air, air resistance                           the object.
  1. speeds up
  2. slows down
  3. does not affect its speed
  4. changes the shape of
Grade 8 Physics
If a coin and a feather are dropped to the ground, which one of the following statements will be true?
  1. a feather quickly reaches the ground as it has less mass than a coin
  2. a feather keeps on floating in the air and never touches the ground
  3. a coin quickly reaches the ground because of less surface area
  4. a coin reaches the ground as it has a large surface area
Grade 8 Physics
If the speed of the object decreases by 3 times, its kinetic energy will                  .
  1. increases 3 times
  2. decreases 3 times
  3. decreases 9 times
  4. increases 9 times
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