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Science CH 7 vocab
vocab
12
Science
8th Grade
03/05/2013

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Term
process that produces chemical change, resulting in new substances that have properties different from those of the original substances
Definition
chemical reaction
Term
substance that exists before a chemical reaction begins
Definition
reactant
Term
substance that forms as a result of a chemical reaction
Definition
product
Term
short hand form for writing what reactants are used and what products are formed in a chemical reaction
Definition
chemical equation
Term
chemical reaction in which heat energy is absorbed
Definition
endothermic reaction
Term
chemical reaction in which heat energy is released
Definition
exothermic reactions
Term
minimum amount of energy needed to start a chemical reaction
Definition
activation energy
Term
measure of heow fast a chemical reaction occurs
Definition
rate of reaction
Term
describes how much solute is present in a solution compared to the amount of solvent
Definition
concentration
Term
substance that slows down a chemical reaction, making the formation of a certain amount of product take longer
Definition
inhibitor
Term
substance that speeds up a chemicl reaction but is not used up intself or permanently changed
Definition
catalyst
Term
catalysts that are large protein molecules which speed up reactions needed for your cells to work properly
Definition
enzyme
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