ch 5 Thermal Energy

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Across
  1. 1. material through which thermal energy moves slowly
  2. 2. the study of the relationship between between thermal energy, work, and heat
  3. 6. ___ ___ of thermodynamics states that energy spontaneously spreads from regions of higher concentrations to lower concentrations
  4. 9. device that converts thermal energy into mechanical energy
  5. 11. device that transforms radiant energy from the sun into thermal energy
  6. 13. a two-way air conditioner
  7. 14. transfer of thermal energy by collisions that make up (solid) matter
Down
  1. 1. a heat engine that burns fuel inside a set of cylinders
  2. 3. ___ ___ of thermodynamics states that if the mechanical energy of a system is constant, the increase in the thermal energy of the system equals the sum of the thermal energy transferred into the system and the work done on the system
  3. 4. the up or down movement of a piston in an engine
  4. 5. transfer of thermal energy in a fluid by movements of warmer and cooler fluid
  5. 7. energy that's transferred between objects due to a temperature difference between those objects
  6. 8. ___ ___ is the sum of kinetic and potential energy of the particles in an object
  7. 10. amount of heat needed to raise the temperature of 1kg of a substance by 1 Celsius degree
  8. 12. transfer of thermal energy by waves