Thermal Energy and Heat

2. Is an increase in the volume of a material due to a temp. increase.
4. The transfer of thermal energy when particles of a fluid move from one place to another.
5. The second law of thermodynamics states that thermal energy can ______ from colder objects to hotter objects...
9. The transfer of thermal energy with no overall transfer of matter.
12. Sunlight that is converted into usable energy.
13. The first law of thermodynamics states that energy is ______________.
18. The third law of thermodynamics states that _________ zero cannot be reached.
21. Conduction in _____ is slower than in liquids and solids.
22. The study of conversions between thermal energy and other forms of energy is called ____________.
23. The transfer of thermal energy from one object to another because of a temperature difference.

1. Occurs when a fluid circulates in a loop as it alternately heats up and cools down.
3. Thermal energy beneath the Earth's surface.
6. A thermal ___________ is a material that conducts thermal energy well.
7. Is the amount of heat needed to raise the temperature of 1 gram of a material by 1 degree C.
8. Is related to the average kinetic energy of the particles in an object due to their random motions through space.
10. Type of resources that include oil, natural gas, coal, and uranium.
11. Thermal energy that is not converted into work is called ______ heat.
13. An instrument used to measure changes in thermal energy.
14. All object radiate __________.
15. Any device that converts heat into work is a heat _______.
16. Thermal energy depends on the _______, temperature, and phase.
17. A transfer of energy is called ________.
19. The transfer of energy by waves moving through space.
20. A thermal ___________ conducts thermal energy poorly.