Chemistry

2. The temperature at which a liquid becomes a gas below the surface.
4. The transfer of energy by the movement of fluids with different temperatures.
6. A reaction that transfers energy from the reactants to the surroundings usually as heat.
8. The change of a substance from a gas to a liquid.
9. A reaction in which energy is transferred to the reactants from the surroundings usually as heat.
11. A change from one state (solid, liquid, or gas) to another without a change in chemical composition.
14. A measure of the average kinetic energy of all particles within an object.
15. The transfer of energy from the particles of one object to those of another object due to a temperature difference.
16. The energy stored within atoms and molecules that can be released when a substance reacts.
18. The energy that is generated and measured by heat.

1. The transfer of energy as heat between particles as they collide within a substance or between two objects in contact.
3. The amount of energy transferred as heat that will raise the temperature of 1 kg of a substance by 1 K.
5. The stored energy resulting from the relative positions of objects in a system.
7. The energy of a moving object due to its motion.
10. The change of a substance from a liquid to a solid.
12. The measurement of heat.
13. The change of a substance from a solid to a gas.
17. The temperature at which a solid becomes a liquid.
19. The transfer of energy by electromagnetic waves.
20. The ability to change or move matter.