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Eighth Grade (Grade 8) Physics Questions

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Grade 8 Forces and Motion
Grade 8 Forces and Motion
Which best describes the motion of the object recorded in data table?
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 Forces and Motion
Which best describes the motion of the object recorded in data table?
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
Grade 8 Magnetism and Electricity
The diagram shows the magnetic field lines for a bar magnet. Which statement best describes the strength of the magnetic field for the bar magnet?
Magnetic Lines Of Forces
  1. The magnetic field is strongest at north pole of the magnet.
  2. The magnetic field is strongest at the south pole of the magnet.
  3. The magnetic field is strongest at both the north and south poles.
  4. The magnetic field is strongest in the region between the north and south poles.
Grade 8 Heat Transfer
Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot like the end in the hot water?
  1. The hot water causes a chemical reaction to take place in the spoon.
  2. The heat from the hot water is conducted to the spoon handle.
  3. The hot water heats the air surrounding the upper part of the spoon.
  4. The hot water causes a physical change in the spoon handle.
Grade 8 Magnetism and Electricity
In a circuit schematic, this symbol would represent a(n)                        .
Switch Open
  1. open switch
  2. closed switch
  3. fluorescent light bulb
  4. incandescent light bulb
Grade 8 Magnetism and Electricity
Which of the following best describes the circuit diagram?
Series Circuit
  1. open circuit in series
  2. closed circuit in series
  3. open circuit in parallel
  4. closed circuit in parallel
Grade 8 Energy and Momentum
Any energy that is stored is called
  1. Kinetic Energy
  2. Cooking energy
  3. Potential energy
  4. Thermal energy
  5. Sound Energy
  6. Electrochemical Energy
Grade 8 Waves and Sound
We measure the frequency of a wave in
  1. Meters
  2. Hertz
  3. Meters per second
  4. Hertz per second
Grade 8 Magnetism and Electricity
Grade 8 Forces and Motion
A velocity-time graph of a moving object is shown. Which statement best describes the object's velocity between points D and E?
Velocity Vs. Time
  1. The object's velocity is increasing.
  2. The object's velocity is decreasing.
  3. The object's velocity is constant.
  4. The object is stopped.
Grade 8 Energy and Momentum
The ratio of work to time, or the rate of work, is known as
  1. force.
  2. mechanical advantage.
  3. efficiency.
  4. power.
Grade 8 Magnetism and Electricity
Which statement is true about this symbol when used in a circuit drawing?
Switch Closed
  1. the switch is open and electricity can flow through the circuit
  2. the switch is open and electricity cannot flow through the circuit
  3. the switch is closed and electricity can flow through the circuit
  4. the switch is closed and electricity cannot flow through the circuit
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