1. Topics: 1.States of Matter 2.Pure Substances 3.Mixtures 4.Physical and Chemical Changes 5.Law of Conservation of Mass

2. Everything that has mass and volume is called matter.

3. States of Matter

4. Computer chips and integrated circuits Computer hard drives Electronics Machine tools Medical implants and prosthetics Audio and video tapes Aircraft and automobile engine parts Printing on plastic food containers Energy-efficient window coatings High-efficiency window coatings Safe drinking water Voice and data communications components Anti-scratch and anti-glare coatings on eyeglasses and other optics Uses of Plasma

5. Classification of Matter

6. Fixed composition Cannot be separated into simpler substances by physical changes Only changed chemically Properties don’t change. Characteristics of Pure Substances

7. Compounds 2 or more elements chemically combined Formula, Molecule Ex. Water, Carbon Dioxide, Oxygen gas H 2 O, CO 2, O 2 Elements Cannot be broken down by chemical means Ex. Gold, Sodium, Copper, Oxygen Single symbols, atoms Au, Na, Cu, O 2 Types of Pure Substances – All use symbols!

8. 2 or more substances NOT chemically bonded. No formulas or symbols Variable composition Parts keep individual properties Separated into pure substances by physical methods What is a Mixture?

9. Homogeneous VS Heterogeneous Look the same throughout Examples Solutions Solute & Solvent Don’t look the same throughout or have different size particles Examples Suspension Colloid (liq/solid) Emulsion (liq/liq)

10. Physical Properties – observed & measured w/o changing substance Density Size Boiling Pt. Shape Mass Texture Melting Pt. Strength Hardness Magnetism Color Volume

11. What do physical properties determine? Determine uses for item. –Aluminum for foil –Isopropyl alcohol for cooling –Graphite for writing

12. Methods to separate mixtures Filtering Distillation Magnets Evaporation Chromatography

13. Chemical Properties Describes how substance changes into a new substance, –Reactions –Energy and mass rearrange –Ex. – burning, rusting, acid/base reactions

14. Used to change pure substances 5 signs of chemical change –Temp change –Light –Color change –Bubbles –Smell Make new substances Chemical Changes

15. Matter cannot be created nor destroyed. It is just converted from one form to another. Law of Conservation of Mass