| A | B |
|---|
| Chemistry | the study of the properties of matter and how matter changes |
| Substance | a single kind of matter that is pure, meaning it always has a specific makeup--or composition--and a specific set of properties |
| Physical Property | a characteristic of a pure substance that can be observed without changing it into another substance |
| Chemical Property | a characteristic of a pure substance that describes its ability to change into different substances |
| Element | a pure substance that cannot be broken down into any other substances by chemical or physical means |
| Element | the simplest substance--it cannot be broken down |
| Element | can be identified by its physical and chemical properties |
| Atom | the basic particle from which all elements are made |
| Chemical Bond | a force of attraction between two atoms |
| Molecules | groups of two or more atoms held together by chemical bonds |
| Mixture | made of two or more substances--elements, compounds, or both--that are together in the same place but are not chemically combined |
| Heterogenous Mixture | a mixture where you can see the different parts (e.g. salad) |
| Solution | a homogeneous mixture, well-mixed containing a solvent and at leat one solute that has the same properties throughout |
| Homogeneous Mixture | a combination of compounds that are so evenly mixed that you can't see the different parts (e.g. sugar water) |
