1. Chapter 1 Pages 2 - 35

2.  Properties of matter and changes of matter  Matter: anything that has mass and takes up space

3.  Any substance that has a definite composition ◦ Always made of the same stuff in exactly the same proportions  Examples: H 2 O, NaCl, C 12 H 22 O 11  All around us

4.  Changes in chemicals ◦ Ex: things growing, food cooking, taking a photo (film)  We use reactions to produce chemicals ◦ Ex: plastics, acids

5.  Solid, Liquid, Gas ◦ What is the difference between ice, water, steam?  Solid ◦ Definite shape, definite volume  Liquid ◦ No definite shape, definite volume  Gas ◦ No definite shape, no definite volume

6.  Properties that can be measured or observed without changing it’s identity ◦ Length, mass, color, odor, density, boiling point, melting point

7.  Matter can change ◦ Ice melts, water fogs a mirror, bike spokes rust, red clothes fade, milk sours  2 types of changes

8.  A change in which the identity of a substance does not change ◦ Change physical properties  Melting, freezing, dissolving, crushing, boiling

9.  Also called a chemical reaction  Things turn into something new  2 parts of a chemical reaction ◦ Reactants – things that react ◦ Products – things that are produced

10. Reactant + Reactant  Product + Product Propane + Oxygen  Carbon Dioxide + Water

11.  1 of 4 things must happen 1. A gas is produced 2. Formation of a precipitate 3. Release of heat and light 4. Color change