vocabulary list
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Activation Energy | What is needed to start a chemical reaction
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| Arrow | you read the arrow as "yields"
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| Characteristics of a chemical reaction | changes in energy or changes in properties
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| Chemical changes | alter the chemical properties of matter; new substances with new properties are formed
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| Chemical equations | a shorter easier way to show chemical reactions by using symbols instead of words
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| Coefficient | a number placed in front of a chemical formula in an equation.
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| Conservation of mass | the amount of matter involved in a chemical reaction
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| concentration | amount of one material in a given amount of another material
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| temperature | higher heat causes faster reactions
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| surface area | increased surface area = increased reaction
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| cataysts | materials that increase the rate of reaction
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| Enzymes | biological catalysts
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| inhibitors | biological catalysts
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| inhibitors | decreases the rate of reaction
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| Decomposition Reaction | a compound breaks down into simpler substances
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| endothermic reaction | a reaction that takes away heat
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| exothermic reaction | a reaction that releases heat
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| physical changes | alter only the physical properties of matter; no new substances are formed. (size, shape, color, etc.)
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| precipitate | a solid that forms from solution during a chemical reaction
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| products | the materials you have after a chemical reaction; written on the right side of the formula
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| reactants | the materials you have at the beginning of the chemical reaction; written on the left side of the formula
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| replacement reaction | one part of a compound is displaced by an element or compound from another substance
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| states of matter | solid, liquid, gas
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| subscripts | show the number of atoms of an element in a molecule or the ratio of elements in a compound.
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| synthesis reaction | 2 substances combine to form a new compound (also called composition reaction)
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