| Term | Definition |
|---|
| matter | anything that has mass and takes up space |
| chemistry | the study of the properties of matter and how matter changes |
| substance | a single kind of matter that is pure |
| physical property | observed without changing the substance into another substance |
| chemical property | ability of a substance to change into different substances |
| element | a pure substance that cannot be broken down into any other substance |
| atom | the basic particle of an element |
| chemical bond | a force of attraction between two atoms |
| molecule | a particle formed when two or more atoms are held together by chemical bonds |
| compound | a pure substance made of two or more elements chemically combined in a set ratio |
| chemical formula | shows the elements in the compound and the ratio of atoms |
| mixture | two or more substances that are together in the same place but are not chemically combined |
| Heterogeneous mixture | a mixture where you can see the different parts |
| Homogeneous mixture | a mixture that is so evenly mixed; you cannot see the different parts |
| solution | an example of a homogeneous mixture |
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