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26 Cards in this Set
- Front
- Back
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Anything that has mass and occupies 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 hte substance into another substance
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Physical property
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a characteristic of a substance taht 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 sbstances undergo chemical changes that result in the formtion of new substances
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chemical change
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a solid that forms from a solution durnig 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 taht 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 reation, 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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principle stating that matter is not created nor destroyed in chemical reactions
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conservaiton 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 eeach 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 compunds 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 neded tog et a chemical reaction started
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activation energy
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the amount of one material in a certain volulme 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 reactons 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 relases enery when burned
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fuel
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