| A | B |
|---|
| molecule | a group of atoms that are joined together and act as a single unit |
| density | an object's mass divided by its volume |
| temperature | a measure of the average energy of motion of particles of matter |
| element | a pure substances that cannot be broken down into any other substances by chemical means |
| energy | the ability to do work |
| physical | during this type of change the form of the substance is altered but not its identity |
| endothermic | during this type of change energy is taken in by a substance |
| electrical | this type of energy is the energy of moving electrons |
| compound | a pure substance made from two or more elements that have been chemically combined in a set ratio |
| kinetic | this type of energy is the energy of motion |
| potential | this type of energy is the energy an object has before it begins to move |
| homogeneous | this type of mixture the substances are evenly distributed throughout the mixture |
| heterogeneous | in this type of mixture the substances are NOT evenly mixed throughout the mixture |
