Physics: Thermal Energy

Crossword Puzzle Exercise
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Complete the crossword, then click on "Check" to check your answer. Click on a number in the grid to see the clue or clues for that number.
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Across:

1. states that it is impossible for heat to flow from a cool object to a warmer object unless work is done.
4. material in which heat flows slowly.
5. device used in an active solar heating system that absorbs radiant energy from the Sun.
6. states that the increase in thermal energy of a system equals the work done on the system plus the heat added to the system.
8. study of the relationship between thermal energy, heat, and work.
9. thermal energy that flows from a warmer material to a cooler material.
10. measure of the average kinetic energy of all the particles in an object.
11. amount of thermal energy needed to raise the temperature of 1 kg of a material 1°C.
12. sum of the kinetic and potential energy of the particles in an object; is transferred by conduction, convection, and radiation.
13. device that converts thermal energy into work.
14. transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another.

Down:

2. transfer of thermal energy by collisions between particles in matter at a higher temperature and particles in matter at a lower temperature.
3. heat engine that burns fuel inside the engine in chambers or cylinders.
7. transfer of thermal energy by electromagnetic waves.