vocab for ch 2
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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physical property | viscosity, conductivity, malleability, hardness, melting point, boiling point, density
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viscosity | the tendency of a liquid to keep from flowing - its resistance to flowing
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conductivity | a materials ability to allow heat to flow
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malleability | the ability of a solid to be hammered without shattering
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melting point | the temperature at which a substance changes from solid to liquid
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boiling point | the temperature at whcih a substance boils
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filtration | the process that separates materials based on the size of their particles
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distillation | a process that separates the substances in a solution based on their boiling points
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physical change | occurs when some properties of a material change but the substances in the material don't change
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chemical property | is any ability to produce a change in the composition of matter
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chemical properties can be observed only when | the substances in a sample of matter are changing into different substances
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flammability | materials ability to burn in the presence of oxygen
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reactivity | the property that describes how readily a substance combines chemically with other substances
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chemical change | occurs when a substance reacts and forms one or more new substances
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precipitate | a solid that aforms and separates from a liquid mixture
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pure substance | matter that always has the same composition
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element | a substance that cannot be broken down into simplier substances
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atom | the smallest particle of an element
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an element has a fixed composition because | it contains only one type of atom
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compound | a substance that is made from two ormore simpler substances and can be broken down into simpler substances
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a compound always contains | two or more elelments joined in a fixed proportion
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heterogeneous misture | parts of the mixture are noticeably different from one another
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the properties of a mixture can vary because | the composition of a mixture is not fixed
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homogeneous mixture | substances are evenly distributed , it is difficult to distinguish one substance in the mixture from another
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solution | when substances dissolve and form a homogeneous mixture
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suspension | a heterogeneous mixture that separates into layers over time
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colloid | contains particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension
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