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Eighth Grade (Grade 8) Heat Transfer Questions

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Grade 8 Heat Transfer
The process of burning fuel is called                  .
  1. thermal expansion
  2. radiation
  3. boiling
  4. combustion
Grade 8 Heat Transfer
What is molecular movement measured in degrees?
  1. pH
  2. salinity
  3. turbidity
  4. temperature
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 Heat Transfer
Diffusion in gases occurs quickly because
  1. the particles are very small.
  2. the particles move around very fast.
  3. gases are very compressible.
  4. the particles are in fixed positions.
Grade 8 Heat Transfer
What do you call the material that easily transfers heat energy?
  1. Conductor
  2. Electron
  3. Insulator
  4. Radiation
Grade 8 Heat Transfer
When burning fossil fuels, the chemical energy is converted into                 .
  1. mechanical work
  2. electrical energy
  3. light energy
  4. heat energy
Grade 8 Heat Transfer
Which object would appear cooler in a room with a temperature of 72 degrees F?
  1. plastic square
  2. metal square
  3. they both appear to have the same temperature
Grade 8 Heat Transfer
The first law of thermodynamics is also known as the                             .
  1. Law of Energy Creation
  2. Law of Energy Transformation
  3. Law of Energy Conservation
  4. Law of Energy Destruction
Grade 8 Heat Transfer
Metal bridges are built with expansion joints because in the summer
  1. the hot metal evaporates.
  2. metal contracts in the Sun.
  3. the metal in the bridge may increase in size.
  4. some metal can reach melting point.
Grade 8 Heat Transfer
Nuclear power plants generate electricity through the process of                          .
  1. mechanical work conversion
  2. chemical energy conversion
  3. nuclear fission
  4. light energy conversion
Grade 8 Heat Transfer
According to the second law of thermodynamics, the total entropy of an isolated system                    .
  1. decreases over time
  2. remains constant
  3. increases over time
  4. fluctuates randomly
Grade 8 Heat Transfer
According to the first law of thermodynamics, energy                                    .
  1. can be created or destroyed
  2. can only be transferred
  3. can only be transformed
  4. cannot be transferred or transformed
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