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Eighth Grade (Grade 8) Heat Transfer Questions

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Grade 8 Heat Transfer
The Carnot engine is a theoretical engine that operates based on the principles of                                 .
  1. the first law of thermodynamics
  2. the second law of thermodynamics
  3. the third law of thermodynamics
  4. the zeroth law of thermodynamics
Grade 8 Heat Transfer
Internal energy is a path variable.
  1. True
  2. False
Grade 8 Heat Transfer
What is convection?
  1. Transfer of heat by the movement of currents within a fluid
  2. Transfer of heat from one particle to another without the movement of matter
  3. The transfer of energy by electromagnetic waves
  4. A conductor
  5. An insulator
Grade 8 Heat Transfer
Which of the following energy transfers would be correct?
  1. Thermal energy from a hot drink is transferred to cold hands.
  2. Thermal energy from the refrigerator is transferred to a hot pie in the refrigerator.
  3. An ice cube loses thermal energy to a hot cup of tea as it melts.
Grade 8 Heat Transfer
Entropy of a system is measured in                .
  1. Joule/kelvin
  2. Joule Kelvin
  3. Kelvin/Joule
  4. Kelvin Joule
Grade 8 Heat Transfer
The second law of thermodynamics governs the direction of heat transfer, which is from                                                          .
  1. a lower temperature region to a higher temperature region
  2. a higher temperature region to a lower temperature region
  3. an isolated system to the surroundings
  4. the surroundings to an isolated system
Grade 8 Heat Transfer
The process during which the entropy of the system remains constant is an                   .
  1. adiabatic process
  2. isobaric process
  3. isothermal process
  4. isentropic process
Grade 8 Heat Transfer
Which of the following is not a form of heat transfer?
  1. conduction
  2. convection
  3. transpiration
  4. radiation
Grade 8 Heat Transfer
Which transfers thermal energy better?
  1. A conductor
  2. An insulator
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