describing matter

1. properties a characteristic of a pure substance that can be observed without changing it into another substance
3. an example of a homogeneous mixture
5. the study of the properties of matter and how it changes
6. mixture so evenly mixed that you cant see the difference
7. a pure substance made of two or more elements chemically combined in a set ratio
11. a single kind of matter that is pure
12. groups of two or more atoms held together by chemical bonds
14. a pure substances that cannot be broken down into any other substance by chemical or physical means
15. made of two or more substances

2. mixture you can see different parts
4. formula shows the elements in the compound and the ratios of atoms
8. anything that has mass
9. property a characteristic of a pure substance that describes its ability to change into different substances
10. bond a force of attraction between two atoms
13. the basic particle from which all elements are made