1. matter

2. Matter is made of up more than 100 difference substances called
elements

3. An element is a substance that cannot be
broken down into any other substance

4. Elements are represented by one or two letter symbols
Elements are represented by one or two letter symbols. For example O is for ____________ and Ca is for ______________.
Oxygen calcium

5. Particle theory explains that all matter is made of
atoms

6. When atoms combine, they form
molecules

7. A substance made of two or more elements that are chemically combined in a set ratio is a
compound

8. A compound is represented by a chemical formula, which shows the elements and the ratio of atoms. For example, carbon dioxide is:
CO2 (two oxygen atoms for every one carbon atom)

9. A ____________ is made of two or more substances that are together in the same place but their atoms are not chemically bonded.
mixture

10. Name two types of mixtures:

11. Distillation, filtration, magnetic attraction, evaporation are methods used to __________ mixtures.
separate

12. filter Separating Mixtures #1
Solids can be separated from liquids by pouring the mixture though a:
filter

13. Separating Mixtures #2
Liquids can be separated from each other by heating them up to a temperature at which one of the liquids boil.
Distillation (used for many commercial purposes: distilled water, alcohol, paraffin, kerosene)

14. magnet Separating Mixtures #3
Iron objects can be separated from a mixture using a
magnet

15. evaporation Separating Mixtures #4
When salt water is left in open air, only salt will be left in the container after a time. This is an example of:
evaporation