Energy & States of Matter Vocabulary

2. The measure of the average kinetic energy of the particles in a material.
4. A small particle that is the building block of matter.
6. A system that does not exchange matter or energy with the environment.
7. The study of heat.
13. The amount of thermal energy it takes to increase the temperature of 1kg of a material by 1 degree Celsius.
14. A decrease in a volume as its temperature decreases.
16. A system that exchanges matter or energy with the environment.
18. The transfer of energy from a region of higher temperature to a region of lower temperature.
21. The transfer of thermal energy by collisions between particles of matter.
22. A substance containing atoms of two or more different elements chemically bonded together.
24. A group of atoms that are held together by chemical bonds and act as a unit.
25. When the temperatures of materials that are in contact are the same.
26. A material through which thermal energy flows easily.

1. Matter with a composition that is always the same
3. A substance made of only one type of atom.
5. A material through which thermal energy does not flow easily.
8. The result of the motion of all the particles, and the distance and attractions between those particles in the system.
9. A group of symbols and numbers that represent the elements and the number of atoms of each element that make up a compound.
10. Stored energy due to the interactions between particles or objects.
11. The energy of an object due to its motion.
12. The change in state from a liquid to a gas.
15. The transfer of thermal energy from one material to another by electromagnetic waves.
17. The amount of force per unit area applied to an object's surface.
19. An increase in volume as the temperature increases.
20. Movement in all directions at different speeds.
23. The transfer of thermal energy by the movement of particles from one part of a material to another.
27. The change in state from a gas to a liquid.