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Chapter 14-8thgrade

Vocab Physical Science

QuestionAnswer
Chemical Reaction The process by which one or more substances change to produce one or more different substances.
Precipitate A solid that is produced as a result of a chemical reaction.
Chemical Formula A combination of chemical symbols and numbers to represent a substance.
Chemical Equation A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.
Reactant A substance or molecule that participates in a chemical reaction.
Product The substance that forms in a chemical reaction. (what you get)
Law of Conservation of Mass The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes.
Sythesis Reaction A reaction in which 2 or more substances combine to form a new compound. (Combine stuff together to get a new thing.)
Decomposition Reaction A reaction in which a single compound breaks down to form 2 or more simpler substances. CO2 decomposes into 2 oxygen atoms and 1 carbon.
Single-Displacement Reaction A reaction in which 1 element or radical takes the place of another element or radical in a compound.
Double-Displacement Reaction A reaction in which a gas, a solid precipatate, or a molecular compound forms from the exchange of ions between compounds.
Exothermic Reaction A chemical reaction in which heat is released to the surroundings.
Endothermmic Reaction A chemical reaction that requires heat.
Law of Conservation of Energy The law that states that energy cannot be created or destroyed but can be changed from one form to another.
Activation Energy The minimum amount of energy required to start a chemical reaction.
Inhibitor A substance that slows down or stops a chemical reaction.
Catalyst A substance that changes the rate of a chemical reaction without being used up or changed very much.
Created by: 100001328300901
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