Science Vocabulary Words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Chemistry | the study of the properties
of matter and how matter changes
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| Atom | the smallest particle of an element
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| Precipitate | a solid that forms from a solution during a chemical reaction
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| Reactants | a substance that enters into a chemical reaction
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| Coefficient | a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
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| Concentration | the amount of one material in a certain volume of another material
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| Inhibitor | a material that decreases the rate of a reaction
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| Enzyme | a biological catalyst that lowers the activation energy of reactions in cells
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| Conservation of Mass | the principle stating that matter is not created or destroyed during a chemical reaction
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| Chemical Bond | the force that holds atoms together
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| Synthesis | a chemical reaction in which two or more simple substances combine to form a new, more complex substance
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| Element | a substance that cannot be broken down into any other substance by chemical or physical means
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| Catalyst | a material that increases the rate of a chemical reaction by lowering the activation energy
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| Solution | a well-mixed mixture
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| Subscript | a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
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| Endothermic Reaction | a reaction that absorbs energy
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| Symbol | a one- or two-letter set of characters that is used to identify elements
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| Activation Energy | the minimum amount of energy that has to be added to get a chemical reaction started
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| Exothermic reaction | a reaction that releases energy in the form of heat
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| Mixture | two or more substances that are mixed together but not chemically combined
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| Products | a substance formed as a result of a chemical reaction
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| Combustion | a rapid reaction between oxygen and fuel that results in fire
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| Molecule | the combination of two or more atoms that are chemically bonded
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| Chemical Reaction | the process in which substances undergo chemical changes that result in the formation of new substances
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| Chemical Formula | a combination of symbols that represent the elements in a compound
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| Chemical Change | a change in matter that
produces a new substance
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| Physical Change | 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 Equation | a short, easy way to show a
chemical reaction, using symbols
instead of words
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| Decomposition Reaction | a chemical reaction that breaks down compounds into simpler substances
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| Replacement Reaction | a reaction in which one element
replaces another element in a
compound, or when two elements
in different compounds trade places
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| Fuel | a material that releases
energy when it is burned
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Created by:
Mrs. Klein
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