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Ninth Grade (Grade 9) Heat Transfer Questions

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Grade 9 Heat Transfer
Friction causes kinetic energy to be converted into                  .
  1. potential energy
  2. thermal energy
  3. mechanical energy
  4. electrical energy
Grade 9 Heat Transfer
The transfer of energy (heat) through space by means of electromagnetic waves is
  1. conduction.
  2. convection.
  3. radiation.
Grade 9 Heat Transfer
Thermal energy is measured in                .
  1. Joules
  2. N
  3. Celsius
  4. J/kg
Grade 9 Heat Transfer
Which law of thermodynamics states that when heat is added to a system, it increases the internal energy of the system, and that the heat that escapes does work on the system?
  1. Zeroth Law of thermodynamics
  2. First Law of thermodynamics
  3. Second Law of thermodynamics
  4. Third Law of thermodynamics
Grade 9 Heat Transfer
Which law of thermodynamics is most closely related to the concept of conversation of energy?
  1. Zeroth law of thermodynamics
  2. First law of thermodynamics
  3. Second law of thermodynamics
  4. Third law of thermodynamics
Grade 9 Heat Transfer
Metals conduct heat.
  1. True
  2. False
Grade 9 Heat Transfer
The transfer of heat through matter by molecular activity is
  1. conduction.
  2. convection.
  3. radiation.
Grade 9 Heat Transfer
Which law of thermodynamics best supports the statement that machines cannot be in perpetual motion?
  1. Zeroth law of thermodynamics
  2. First law of thermodynamics
  3. Second law of thermodynamics
  4. Third law of thermodynamics
Grade 9 Heat Transfer
Which law of thermodynamics supports the statement that the entropy of a system at absolute zero is zero?
  1. Zeroth law of thermodynamics
  2. First law of thermodynamics
  3. Second law of thermodynamics
  4. Third law of thermodynamics
Grade 9 Heat Transfer
The first law of thermodynamics states that
  1. components of a system interact.
  2. the entropy of a closed system always increases.
  3. a closed system always shifts toward disorder or homogeneity.
  4. energy is always conserved.
Grade 9 Heat Transfer
As measured on the Celsius scale, the temperature at which ice melts is
  1. -273ºC.
  2. 0ºC.
  3. 32ºC.
  4. 100ºC.
Grade 9 Heat Transfer
The conversion of a vapor directly to solid is best described as
  1. condensation.
  2. deposition.
  3. freezing.
  4. vaporization.
Grade 9 Heat Transfer
A refrigerant in a cooling system cools the surrounding air                 .
  1. as it evaporates
  2. as it condenses
  3. both
  4. neither
Grade 9 Heat Transfer
A metal is a good conductor of heat.
  1. True
  2. False
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