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Eighth Grade (Grade 8) Physics Questions

You can create printable tests and worksheets from these Grade 8 Physics questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

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Grade 8 Simple Machines
Look at the image of the pulley. If bucket A has a mass of 5 kg, which of the following statements is true about the minimum effort force required to lift the bucket if friction is ignored?
Pulley System
  1. it would take 0 kg of effort to lift the bucket
  2. it would take 2.5 kg of effort to lift the bucket
  3. it would take 5 kg of effort to lift the bucket
  4. it would take 10 kg of effort to lift the bucket
Grade 8 Heat Transfer
Choose the following materials that would make good conductors:
  1. Copper
  2. Glass
  3. Plastic
  4. Sweatshirt
  5. Gold
  6. Wood
  7. Rubber
  8. Aluminum
Grade 8 Forces and Motion
The Earth rotates west to east. According to Newton's first law of motion, which should occur if you jumped straight up?
  1. you land east of where you jumped from
  2. you land west of where you jumped from
  3. you land in the same place you jumped from
Grade 8 Forces and Motion

This question is a part of a group with common instructions. View group »

A magician suddenly jerks a tablecloth out from under the dishes on a table. This best demonstrates
  1. an action-reaction pair of forces.
  2. that the dishes have inertia.
  3. that gravity tends to hold the dishes securely.
  4. that the dishes have no acceleration.
Grade 8 Forces and Motion
What is the motion of an object in a complete circle?
  1. rotational motion
  2. periodic motion
  3. linear motion
  4. velocity
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 Forces and Motion
Grade 8 Forces and Motion
Bobby ran East, then North, then West, then South, around his block at a constant speed of 2 m/s. Which of the following statements is NOT true about Bobby's run?
  1. Bobby's velocity changed during his run.
  2. Bobby accelerated during his run.
  3. Bobby's speed increased during the run.
  4. The ground pushed on Bobby's feet with equal force that he applied to the ground.
Grade 8 Forces and Motion
Which best describes the motion of the object recorded in data table below?
Data Table - Positive Acceleration
  1. it does not move
  2. it maintains a constant velocity
  3. it undergoes positive acceleration
  4. it undergoes negative acceleration
Grade 8 Waves and Sound
In a given medium, if the frequency of a wave decreases, its
  1. wavelength increases
  2. speed increases
  3. amplitude decreases
  4. wavelength decreases
Grade 8 Forces and Motion
Which best describes the motion of the object recorded in data table below?
Data Table - Constant Speed
  1. it does not move
  2. it maintains a constant velocity
  3. it undergoes positive acceleration
  4. it undergoes negative acceleration
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