| A | B |
|---|
| pure substances | have the same composition and properties |
| examples of pure substances | elements and compounds |
| compound | two or more elements joined in a fixed proportion ex. salt: NaCl |
| heterogenous mixture | substance with differing ingredients in different proportions: salsa |
| homogenous mixture | substances evenly distributed (looks the same throughout but can be seperated : koolaid and water |
| solution | homogenous mixture with particles too small to settle out: windshield wiper fluid |
| suspension | a heterogenous solution with particles that will seperate into layers: muddy water |
| Colloid | a heterogenous mixture with some large and small particles do not seperate or settle: milk |
| physical property | any property that can be observed or measured : color, weight |
| viscosity | resistance of a liquid to flow : honey |
| conductivity | property of substance which allows heat to flow |
| malleability | property of substance to be hammered and molded: GOLD |
| melting point | temperatureat which substance goes from solid to liquid |
| boiling point | 100 degrees centigrade |
| physical properties | the property which identifies a material |
| chemical properties | properties that cause a change in the substance: flammability and reactivity |
| flammability | chemical property: material's ability to burn |
| reactivity | chemical property:material's ability to combine quickly with others |
| precipitate | evidence of chemical change: solid that seperates from a liquid |
| How to recognize chemical change? | color, gas formation or precipitate |
| magnetism | example of physical property: metal attraction |
| filtration | physical separation: straining particles |
| solubility | physical property: substances ability to dissolve |
