A small particle that is the building block of matter.
Atom
The measure of the average kinetic energy of the particles in a material.
Temperature
A substance that contains only one kind of atom.
Element
An increase in a material's Volume when the temperature is increased.
Thermal Expansion
A substance containing atoms of two or more different elements chemically bonded together.
Compound
Two or more atoms that are held together by covalent bonds and act as a unit.
Molecule
A decrease in a materials volume when the temperature is decreased.
Thermal Contraction
The transfer of thermal energy from a region of higher temperature to a region of lower temperature. Can also refer to the amount of energy being transferred during this process.
Heat
The change in state from a liquid to a gas.
Vaporization
Energy due to motion.
Kinetic Energy
The result of the motion of all the particles, and the distance and attractions between those particles in the system.
Thermal Energy
Matter with a composition that is always the same.
Substance
Stored energy due to the interactions between objects or particles.
Potential energy
A way of showing the types and numbers of atoms in a physical substance.
Chemical Formula
The amount of force per unit area applied to an object's surface.
Pressure