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26 Cards in this Set
- Front
- Back
Anything that has mass and takes up space
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Matter
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The study of the properties of matter and how matter changes
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Chemistry
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a characteristic of a substance that can be observed without changing the substance into another substance
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Physical property
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a characteristic of a substance that describes its ability to change into different substances
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Chemical Property
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a change that alters the form or appearance of the material but does not make the material into another substance
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Physical Change
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the process in which substances undergo chemical changes that result in the formation of new substances
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Chemical Change
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a solid that forms from a solution during a chemical reaction
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Precipitate
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a reaction that absorbs energy in the form of heat
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Endothermic Reaction
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a reaction that releases energy in the form of heat
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Exothermic Reaction
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a short easy way to show a chemical reaction, using symbols
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Chemical Equation
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A substance that enters into a chemical reaction
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Reactant
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a substance formed as a result of a chemical reaction
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Product
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a principle stating that matter is not created nor destroyed in chemical reactions
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Conservation of Mass
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a system in which no matter is allowed to enter or leave
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Closed System
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a system in which matter can enter from or escape to the surroundings
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Open System
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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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Coefficient
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a chemical reaction in which two or more simple substances combine to form a new, complex substance
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Synthesis
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a chemical reaction that breaks down compounds into simpler products
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Decomposition
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a reaction in which one element replaces another in a compound or when two elements in different compounds trade places
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Replacement
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the minimum amount of energy needed to get a chemical reaction started
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Activation Energy
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the amount of one material in a certain volume of another material
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Concentration
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a material that increases the rate of reaction by lowering the activation energy
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Catalyst
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a biological catalyst that lowers the activation energy of reactions in cells
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Enzyme
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a material that decreases the rate of reaction
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Inhibitor
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a rapid reaction between oxygen and fuel that results in a fire
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Combustion
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a material that releases energy when burned
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Fuel
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