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Topic 1 Lesson 1
Describing and Classifying Matter
| Term | Definition |
|---|---|
| Matter | Anything that has mass and takes up space |
| Substance | A single kind of matter that is pure and has 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 substance that describes its ability to change into different substances |
| Atom | The basic particle from which all elements are made; the smallest particle of an element that has the properties of that element |
| Element | A pure substance that cannot be broken down into other substances by chemical or physical means |
| Molecule | A neutral group of two or more atoms held together by covalent bonds |
| Compound | A substance made of two or more elements chemically combined in a specific ratio, or proportion |
| Mixture | Two or more substances that are together in the same place but their atoms are not chemically bonded |