| A | B |
| atom | the smallest particle of an element |
| element | a substance that cannot be broken down into simpler substances |
| compound | substance that is made from 2 or more simpler substances that can be broken down into simpler substances |
| collid | contains some particles that are intermediate in size bewteen the small and large particles in a solution |
| solution | when substances dissolve and form a homogenous matter |
| suspension | a heterogeneous mixture that separates into layers over time |
| homogeneous matter | substances are evenly distributed that it's difficult to distinguish 1 substance in the mixture from another |
| pure substance | matter that always has exactly the same composition |
| heterogeneous matter | parts of the mixture are noticebly different from one another |