Constantly flying around bumping into each other and the container A lot of

Constantly flying around bumping into each other and

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Constantly flying around, bumping into each other and the container A lot of empty space between the particle - compressible Indefinite volume and indefinite shape Matter classified by physical form: Matter classified by physical form: Matter classified by physical form:
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Matter classified by chemical composition: Periodic Table (pure elements) Classify each diagram as a pure substance or a mixture; then element/compound and homogeneous/heterogeneous.
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Question 3: Which of the following is a pure substance? A. Coffee B. Soda C. Ice D. Seawater E. Gasoline Question 4: Classify each substance as a pure substance or a mixture; then element/compound and homogeneous/heterogeneous. A. Wine B.Beef stew C. Iron D.Carbon dioxide Separating Mixtures
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Physical Separation Methods Decanting - separating a heterogeneous mixture with particle size, e.g., sand and water, iron filings and water Filtration - separating a heterogeneous mixture using a filter Physical Separation Methods Distillation – separating homogeneous mixtures with different volatilities Examples: Oil refining Seawater desalination Alcohol production Physical Changes Changes in Matter Chemical Changes Changes that alter state or appearance (not composition) Changes that alter chemical composition
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Physical Changes When water boils, it changes into a gas Its chemical composition is not changed Water molecules are the same in the gas phase as in the liquid phase Chemical Changes The rusting of iron is a chemical change The iron atoms combine with oxygen in the air to form a different chemical substance (iron oxide) Properties of Matter Physical propertiesare the characteristics of matter that can be changed without changing its composition – characteristics that are directly observable – Examples: state, size, mass, volume, color, odor, melting point, boiling point, density, solubilityChemical propertiesare the characteristics that determine how the composition of matter changes as a result of contact with other matter or the influence of energy – characteristics that describe the behavior of matter – Examples: Flammability, corrosiveness, bleaching power explosiveness
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Physical Changes versus Chemical Changes Physical Changes versus Chemical Changes Physical Changes versus Chemical Changes
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