Chapter 2David Wolf
Pure      SubstancesElement            Compounds
MixturesHeterogeneous                Homogenous mixtureMixture                      -Looks Uniform-No Fixed Ratio         ...
Heterogeneous             Homogeneous  Mixture                   MixtureSuspension        Colloid                 Solution
PropertiesDensity     Mass/Volume QuantitativeViscosity  A liquid’s resistance to flowing           QualitativeConducti How...
Physical Change A physical change is when you cut  your hair or boil water. It’s when some  of the properties change but t...
Separation• Filtration, if the particles are large  enough to get stuck in a filter.• Distillation, separation based on  di...
Distillation• Separating mixtures by their boiling  points.• Ex: Separation of a unknown liquid                           ...
Filtration• Separating liquids based on particle  size• Ex: Sulfur and salt lab                                    9
Evaporation• Extracting a dissolved solid from the  liquid.• Ex: Sugar in water                                   10
Observing Chemical          Properties• Can only be observed when the  substance is changing into another  substance.• Fla...
Recognizing Chemical           Changes• You can tell when it changes because  it may; Change Color - Produce Gas -  Format...
Is it a Physical change or        Chemical change• If it is a physical the composition stays  the same.• If it is a chemic...
Is curdling milk a Chemical    or Physical change?                        14
Which element is morereactive, oxygen or nitrogen?                         15
What are two physical     properties?                        16
What happens when you add  vinegar to baking soda?                     17
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  • Science10 22

    1. 1. Chapter 2David Wolf
    2. 2. Pure SubstancesElement Compounds
    3. 3. MixturesHeterogeneous Homogenous mixtureMixture -Looks Uniform-No Fixed Ratio Throughout
    4. 4. Heterogeneous Homogeneous Mixture MixtureSuspension Colloid Solution
    5. 5. PropertiesDensity Mass/Volume QuantitativeViscosity A liquid’s resistance to flowing QualitativeConducti How well something conducts heat/vity electricity QualitativeMalleabili The ability to be hit with a hammerty without shattering QualitativeHardness Whether one object scrapes another QualitativeMelting The temperature at which matter meltsPoint QuantitativeBoiling The temperature at which matter boilsPoint Quantitative
    6. 6. Physical Change A physical change is when you cut your hair or boil water. It’s when some of the properties change but the substance in it stays the same.
    7. 7. Separation• Filtration, if the particles are large enough to get stuck in a filter.• Distillation, separation based on different boiling points.
    8. 8. Distillation• Separating mixtures by their boiling points.• Ex: Separation of a unknown liquid 8
    9. 9. Filtration• Separating liquids based on particle size• Ex: Sulfur and salt lab 9
    10. 10. Evaporation• Extracting a dissolved solid from the liquid.• Ex: Sugar in water 10
    11. 11. Observing Chemical Properties• Can only be observed when the substance is changing into another substance.• Flammability: The ability to burn in the presence of oxygen. Paper in alcohol.• Reactivity: How easily a substance combines chemically with other substances. Rust with oxygen. 11
    12. 12. Recognizing Chemical Changes• You can tell when it changes because it may; Change Color - Produce Gas - Formation of a Precipitate. 12
    13. 13. Is it a Physical change or Chemical change• If it is a physical the composition stays the same.• If it is a chemical change the composition changes 13
    14. 14. Is curdling milk a Chemical or Physical change? 14
    15. 15. Which element is morereactive, oxygen or nitrogen? 15
    16. 16. What are two physical properties? 16
    17. 17. What happens when you add vinegar to baking soda? 17

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