Pearson Interactive Science – Flashcards
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Matter
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Anything that had mass and takes up space
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Chemistry
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The study of matter and how it changes
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Substance
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A single kind of matter that is pure
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Pure
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Always having a specific composition
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Physical Property
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A characteristic of a substance that can be observed without changing it into another substance
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Chemical Property
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A characteristic of a substance that describes it's ability to change into different substances
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Element
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A substance that can't be broken down into any other substance
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Atom
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The basic particle from which all elements are made
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Chemical Bond
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A force of attraction between two atoms
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Molecule
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A group of two or more atoms held together by chemical bonds
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Compound
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A substance made of two or more elements that are chemically combined in a set ratio
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Chemical Formula
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Symbols that show the elements in a compound and the set ratio of atoms
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Mixture
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Two or more substances that are together in the same place but their atoms are not chemically bonded
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Distillation
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A way of separating mixtures(liquids) by heating one liquid to a boiling point, turning it into a gas, then cooling the gas back into a separate liquid
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Evaporation
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A way of separating mixtures by leaving the mixture in open air, turning the liquids into gasses, then leaving behind solid components
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Filtration
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A way of separating mixtures by pouring the mixture through a filter
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Magnetic attraction
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A way of separating a mixture by pulling out a component(magnetic) in a mixture using magnets
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Weight
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A measure if the force of gravity on something
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Mass
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The amount of matter in an object
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International System of Units
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A system of measurement based on units of 10
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Volume
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The amount of space that matter occupies
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Density
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A measure of the mass of a material in a given volume
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Physical Change
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A change which alters the form or appearance of matter but does not turn any of the substances in the matter into a different substance
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Chemical Change
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A change in matter that produces one or more new substances
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Law of Conservation of Mass
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The principle that the total amount of matter is neither created nor destroyed during chemical or physical changes
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Temperature
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A measure of how hot or cold something is
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Thermal energy
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The total energy of the motion of all of the particles in an object
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Endothermic change
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A change in which energy is absorbed
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Exothermic Change
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A change which releases energy
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Chemical Energy
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The energy stored in the chemical bonds between atoms
