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Published byBernice Mathews Modified over 9 years ago
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Matter Anything that has mass and takes up space
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Properties of Matter Physical – can be observed or measured without changing the composition Chemical – the ability of a substance to undergo chemical change – to form new substances
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Examples of Physical Properties: -Color -Mass -Volume -Density -Melting Point -Boiling Point -Odor
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Examples of Chemical Properties: -Flammability -Oxidation -Reacts with Acids -Reacts with Bases -Reacts with Water -Toxicity
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Changes in Matter Physical – no new substance is formed Chemical – one or more new substances are formed
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Indicators of Chemical Change Precipitate - Solid forms. Gas Formation - Gas/bubbles form Color Change - Color changes Energy Change - Creates heat or light Odor Changes - Smell becomes different (Don't forget to waft.) Alone these don’t always indicate a chemical change has occurred the true test is have new substances formed
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How Many States of Matter?
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There are 4!! Solid – has a definite shape and a definite volume
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Liquid : has a definite volume but no definite shape
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Gas: has no definite shape or volume and is easily compressible
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Three Phases of Matter Solid – Liquid – Gas
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Three States of Matter Solid – Liquid – Gas Why is water different from most substances in the solid phase?
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Plasma: The Fourth State of Matter - the most abundant in the universe - ionized gases
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Pure Substances Elements – simplest form of matter which consist of only one type of atom
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Pure Substances Compounds – can only be separated by chemical reactions – consist of two or more types of atoms chemically combined Salt Water
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Mixtures: A physical blend of two or more substances which can be separated by physical means
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Heterogeneous Mixture Not uniform composition Sand
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Homogeneous Mixture Uniform composition – evenly mixed – single phase Solutions
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Not all solutions are alike: Can you think of an example of - Solution of a gas in a liquid - Solution of a solid in a liquid - Solution of a liquid in a liquid - Solution of a solid in a solid So what defines a solution?????
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Law of Conservation of Mass In any chemical or physical change matter is neither created or destroyed 2H 2(g) + O 2(g) 2H 2 O (l)
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