Muench Sci Vocab: Matter
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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| atom | Smallest particle of an element that has the properties of that element
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| molecule | the particle of a kind of compound (ex.: H2O)
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| element | Substance with a single kind of atom; ex. O2 (oxygen)
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| property | Describes a substance or object
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| closed system | Nothing gets in or out -- like a closed box or balanced equation.
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| conservation of matter | Stuff doesn't go away, and it doesn't come from nowhere.
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| physical change | A change in some description (property) for a substance, but it remains the same substance
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| density | The amount of matter in a given volume: D=m/v
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| temperature | A measurement of the average thermal energy (commonly called "heat") in a substance
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| mixture | Two or more substances combined (Do not confuse with compound.)
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| compound | A particle (molecule or ionic) made of two or more elements (Do not confuse with mixture.)
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| volume | Measures how much space the object takes up, given in cubic units or liters
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| chemical change | When a substance becomes new substance(s) with new properties
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| matter | Anything that has volume and mass
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| characteristic property | Description for a substance that could identify the substance, no matter how much you had
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| substance | Matter of all one kind of particle, and with specific properties
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| mass | A measurement of the amount of matter in an item; does not change with gravity
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| weight | A measure of the force of gravity on an item; do not confuse with mass
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| heat | a transfer of thermal energy from a warmer object to cooler one (and ALWAYS in that direction)
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| solid | particles close together, vibrating in place; may be formed from molecules or crystals
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| liquid | particles close together like solid but can change relative position
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| gas | particles widely spaced and moving freely
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| endothermic | reaction in which products store energy in chemical bonds from surroundings, having more stored energy than the reactants; detected as decrease in temperature
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| exothermic | reaction in which products release energy from chemical bonds to surroundings, having less stored energy than the reactants; detected as increase in temperature
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| reactants | the starting substances in a chemical change
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| products (chemical change) | the resulting substances from a chemical change
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