Unit 2

2. Direct transfer of thermal energy from the source
6. A measure of the average kinetic energy of the molecules of a substance
12. Compressing air _________
14. The transfer of thermal energy from one thing to another
15. The movement of a single type of energy from one substance to another
16. Thermal energy transfer from molecule to molecule
17. When a substance is heated and its molecules jiggle faster and move farther apart
18. The property of a system that enables it to do work
19. Force x distance
21. The process of changing from a gas to a liquid
24. When water evaporates, molecular kinetic energy will _________
27. The conversion of one type of energy into a different type of energy
30. Thermal energy transfer driven by density differences in fluids
31. Not rigid, no fixed shape, fixed volume

1. Water molecules can connect to other water molecules through ________ bonds
3. The force that is formed between two masses is _________ proportional to the square of the distance between them
4. A quantity that indicates how warm or cold something is relative to a standard
5. The study of the movement of thermal energy
7. The type of energy that is stored and held in readiness
8. Not rigid, no fixed shape, no fixed volume
9. The process of changing from a liquid to a solid
10. The process of changing from a liquid to a gas
11. When two substances have transferred thermal energy and reached the same temperature
13. Mass x velocity
16. The law of ________ of energy states that energy cannot be created or destroyed
20. Energy in motion
21. G is known as the universal gravitational _________
22. The effort exerted on something to change its energy
23. When ice melts, latent heat is ________
24. Force x time
25. Expanding air _________
26. The process of changing from a solid to a liquid
28. The unit for work and energy
29. Rigid, fixed shape, fixed volume