science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| chemistry | the study if the properties of matter changes
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| element | a substance that cannot be broken down into any other substances by chemical or physical means
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| compound | a substance made of two or more elements chemically combined in a specific ration, or proportion
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| mixture | made from two or more pure substances - elements, compounds, or both - that are in the same place but not combined as a new material
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| solution | well-mixed mixture
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| physical changes | a change that alters the form or appearance of a material but does not make the material into another substance
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| chemical changes | a change in matter that produces new substances
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| precipitate | a solid that forms form solution during a chemical reaction
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| atom | the smallest particle of an element
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| molecule | the combination of two or more atoms
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| chemical bond | the force that holds atoms together
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| chemical equation | a shorter, easier way to show chemical reactions, using symbols instead of words
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| symbol | a one-letter or two-letter symbol that represents most elements
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| chemical formula | a compound that is represented by a"word," shows the ratio of elements in the compound
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| subscirpt | shows the number of atoms of an element in a molecule
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| reactants | materials you have at the beginning of a chemical reaction
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| products | are the different materials you have at the end or finish of a reaction
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| coefficient | a number in front of a chemical formula in the equation
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| synthesis | when two or more substances combined to make a more complex substances
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| decomposition | a reaction that breaks down compounds into simpler products
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| replacement reactions | a reaction in which one element replaces another in a compound or in which two elements different compounds trade places
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| exothermic reaction | a reaction that release energy in the form of heat
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| endothermic reaction | a reaction that absorbs energy
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| activation energy | the minimum amount of energy that has to be added to start a reaction
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| concentration | the amount of one material in a given volume of another material
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| catalyst | a material that increases the rate of a reaction by lowering the activation energy
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| enzymes | provide a surface on which reactions take place
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| inhibitor | a material used to decrease the rate of a reaction
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| combustion | a rapid reaction between oxygen and a substance
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| fuel | a material that releases energy when it burns
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
tberry1
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