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Stack #1788493

physical change a change that alters the form or appearance of a material but does not make the element into a new substance
Chemical change A change in which one or more substances combined or break apart to form new substances
reactant A substance that enters into a chemical reaction
product A substance formed as a result of a chemical reaction
endothermic reaction A reaction out of sorts energy
exothermic reaction action that releases energy usually in the form of heat
Precipitate A solid that forms from a solution during a chemical reaction
Chemical equation A short easy way to show a chemical reaction using symbols
law of conservation of mass The principles that the total amount of matter is neither created nor destroyed during any chemical or physical change
Open system A system in which matter can enter from or escape to the surroundings
closed system A system in which no matter is allowed to enter or leave
coefficent A number in front of a chemical formula and equation that indicates how many molecules or Adams of each reactant and product involved in a reaction
replacement and reaction in which one element replaces another in a compound or two elements in different compounds trade places
synthesis A chemical reaction in which two or more simple substances combined to form a new more complex substance
decomposition A chemical reaction that breaks down compounds into simpler products
activation energy The minimum amount of energy needed to start a chemical reaction
concentration The amount of one material in a certain volume of another material
enzyme A type of protein that speeds up a chemical reaction in a living thing A biological catalyst that lowers the activation energy of reactions in cells
catalyst and materials that increases the rate of reaction by lowering the activation energy
inhibitor to material that decreases the rate of a reaction
Created by: allison.murie