Ch. 2 Vocab

2. stored energy due to the interactions between objects or particles.
6. the object that gains energy from the energy transfer.
8. the object that provides energy for energy transfer.
10. a system that exchanges matter or energy with the environment.
13. a material through which thermal energy does not flow easily.
14. a material through which thermal energy flows easily.
15. the transfer of thermal energy by collisions between particles of matter.
16. the movement of substances from an area of higher concentration to an area of lower concentration.
17. the result of the motion of all the particles, and the distance and attractions between those particles in the system.
18. the transfer of thermal energy from one material to another by electromagnetic waves.
20. the change in state from a liquid to a gas.
21. the study of heat.

1. a decrease in a material’s volume when the temperature is decreased.
3. the transfer of thermal energy from a region of higher temperature to a region of lower temperature. Heat can also refer to the amount of energy transferred during this process.
4. the process by which a gas changes to a liquid.
5. when the temperatures of materials that are in contact are the same.
7. the transfer of thermal energy by the movement of particles from one part of a material to another.
9. the amount of thermal energy it takes to increase the temperature of 1 kg of a material by 1ºC.
11. energy due to motion.
12. movement in all directions and at different speeds.
14. an increase in a material’s volume when the temperature is increased.
15. a system that does not exchange matter or energy with the environment.
19. the measure of the average kinetic energy of the particles in a material.