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Chemical Reactions
Physical Science
Term | Definition |
---|---|
Matter | anything that has mass and takes up space. |
physical property | a characteristic of a substance that can be observed without changing the substance into another substance. |
chemical property | a characteristic of a substance that describes its ability to change into another substance. |
chemical reaction | a change in matter that produces one or more new substances. |
endothermic reaction | a reaction in which energy is absorbed. |
exothermic energy | a reaction that releases energy in the form of heat. |
chemical equation | uses chemical formulas and other symbols instead of words to summarize a reaction |
Conservation of mass | during a chemical reaction, matter is not created or destroyed. |
coefficient | a number placed in front of a chemical formula in an equation. |
catalyst | a material that increases the rate of a reaction by lowering the activation energy. |
inhibitor | a material used to decrease the rate of a reaction |
combustion | a rapid reaction between oxygen and a substance called a fuel. |