1. Physical Property: Describes a substance’s appearance. Chemical Property: Describes how matter reacts to change into other chemically different substances.

3. Clues that a Chemical Change has taken place: Formation of a gas Formation of a precipitate (solid that won’t dissolve) Release or absorption of energy A change in color

7. Are the following examples chemical or physical changes?

8. When food is chewed?

9. When fireworks explode?

10. When a rock breaks?

11. When a steak is grilled?

12. When a pond freezes?

13. When sugar dissolves in tea?

14. Intensive Properties : Properties that remain the same no matter how much matter is present. Extensive Properties : Properties that depend on the amount of matter present.

15. IntensiveExtensive Color Odor Luster - shininess Malleability – ability to be hammered Ductility - ability to be drawn into wire Conductivity – Flow of energy or electricity Hardness Melting/Freezing Point Boiling Point Density - how compact something is Mass Volume Length

16. Solids Structure? Definite Volume? Definite Shape? Liquids Gases Compress- ibility?