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Introduction to Matter Vocabulary
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Matter Anything that has mass or takes up space
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Atom The smallest particle of an element that has the properties of that element
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Element A pure substance that cannot be broken down into a simpler substance by ordinary chemical changes. An element consists of atoms of only one type.
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Pure Substance A single kind of matter that is pure and has a specific set of properties
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Compound A substance made up of two or more different types of elements chemically combined
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Compound
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Molecule A group of atoms that are held together by covalent bonds so that they move as a single unit
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Mixture Matter that consists of two or more substances mixed together but not chemically combined
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Heterogeneous Mixture
A mixture in which pure substances are unevenly distributed throughout the mixture
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Homogeneous Mixture A mixture in which pure substances are evenly distributed throughout the mixture
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Physical Change A change in a substance that does not change its identity
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Physical Change Cutting Tearing Folding Writing on Painted Melting
Boiling Freezing
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Physical Property A characteristic of a pure substance that can be observed without changing it into another substance
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Chemical Property A characteristic of pure substances that describes how it can form a new substance
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Chemical Change A change in which one or more substances combine or break apart to form new substances
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Chemical Change NEW matter is formed and CANNOT be undone Burning
Rusting Cooking Digesting food Leaves changing colors Food rotting
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