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30 Cards in this Set
- Front
- Back
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What is an alloy?
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a mixture containing mostly metals.
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What is a chemical change?
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a disassociation, recombination or rearrangement of atoms
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classification (matter)?
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solids, liquids, gases
elements, compounds, mixtures |
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What is colloid?
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a heterogeneous mixture composed of tiny particles suspended in another material.
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What is combustion?
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a chemical reaction that produces CO 2 and H2O as products.
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What is composition?
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the act of combining parts or elements to create a whole
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What is a compound?
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a material formed from elements chemically combined in definite proportion in mass.
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What is conductivity?
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a measure of how easily an electric current can pass through a material.
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What is conservation of mass?
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there is no change in total mass during a chemical change
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What is density?
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mass of a substance per unit volume
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what is dissolving?
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to make a solution
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What is distillation?
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a technique for separating components of a mixture on the basis of differing boiling points.
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What is an element?
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a substance composed of atoms with identical atomic numbers
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What is filtration?
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the separation of solids from fluids.
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What is flammability?
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how easily something will burn or ignite.
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What is heterogenous?
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a sample of matter consisting of more than one pure substance and more than one phase.
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What does homogenous mean?
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having uniform properties or composition
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What is insoluble?
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refers to a substance that does not dissolve in a solvent
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What is a laser?
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a bright beam of concentrated light
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What does malleable mean?
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capable of being hammered into sheets
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What is a mixture?
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a sample of matter consisting of more than one pure substance
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What does physical change mean?
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a change which does transform one substance into another
ex: water into ice |
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What is pressure?
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force per unit area
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What is property?
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a measurement of a substance
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What is a pure substance?
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a sample of matter that cannot be separated into simpler components without chemical change
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What is a solution?
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a homogenous mixture
a sample of matter of more than one pure substance whose properties do not vary |
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What is suspension?
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a heterogenous mixture in which droplets or particles are suspended in a liquid
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What is the Tyndall Effect?
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light passing through a heterogenous mixture is scattered by suspended particles
Ex: car's headlights can be seen in fog but not in clear air |
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What does uniform refer to?
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always the same
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What is volume?
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the amount of space an object takes up.
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