Phases of Matter Cornell Notes page 125

Kinetic Energy The amount of energy an object possesses due to it’s motion.

A type of energy (thermal energy) Heat

Kinetic Molecular Theory Explanation of how particles in matter behave Adding energy/heat to a molecule speeds up the motion of the molecules and increases the space between them, (removing heat does the opposite.)

Temperature A measure of heat (energy)

Definite Indefinite Clearly defined or determined Fixed (stays the same) No fixed limit; unlimited Not clearly determined Doesn’t stay the same

Molecule One or more atoms chemically combined to make a single molecule.

http://tune.pk/video/3720060/kinetic-molecular-theory-animation (kinetic molecular theory)

Solids Definite volume Definite shape (solids keep their shape and keep the same volume, no matter what container they are in) Molecules form a rigid structure Low energy

http://www.youtube.com/watch?v=5jpA1H1adII Molecules in a solid

Liquids Definite volume Indefinite shape (liquids maintain the same volume, but will take the shape of their container.) Molecules slide past each other Higher energy level

http://www.youtube.com/watch?v=w_mOvnv1ns4 (Molecules in a liquid)

Gases Indefinite volume Indefinite shape Gases expand to fit their container, changing both volume and shape Molecules move freely past each other Highest energy level