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Eighth Grade (Grade 8) Heat Transfer Questions

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Grade 8 Heat Transfer
How does the energy and motion of particles change as a substance is heated?
  1. They gain more energy but less speed.
  2. They gain more energy and more speed.
  3. They slow down.
  4. They gain speed, collide more, both with each other and the walls of the container which causes expansion and temperature rise.
Grade 8 Heat Transfer
Sample 1 has 500 grams of sodium at a temperature of 25 degrees Celsius. Sample 2 has 100 grams of sodium at a temperature of 25 degrees Celsius. What is true about the thermal energy of the two samples?
  1. Sample 1 has more thermal energy.
  2. Sample 2 has more thermal energy.
  3. Samples 1 and 2 have equal amounts of thermal energy.
  4. None of the above.
Grade 8 Heat Transfer
What is conduction?
  1. Energy transfer by touch
  2. Energy transfer by electromagnetic wave
  3. Energy transfer by sound
  4. Energy transfer by liquid or gas
Grade 8 Heat Transfer
Scientists use the                 scale to measure temperature.
  1. Fahrenheit
  2. Celsius
  3. Degree
  4. Pounds
Grade 8 Heat Transfer
Most materials                   when their temperatures increase.
  1. expand
  2. contract
  3. turn to a liquid
  4. none of the above
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