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33 Cards in this Set
- Front
- Back
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Molecule
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Two or more atoms that are chemically bonded
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Hypothesis
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Tentative interpretation or explanation of an observation
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Experiment
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Highly controlled set of procedures designed to generate observation
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An experiment _____________ _____ _____________ a hypothesis.
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confirms or rejects
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Law
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Generalization about a past observation from which future observations can be predicted
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A scientific law allows us to _______ ________ but not _______ ________ .
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make predictions , explain why
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Theory
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Explanation of an observation or law
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A theory can never ______ _______ _______ because it has to have _______ _________ _________ _________ .
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be proven correct , every possible instance tested
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Matter
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Anything that has mass and takes up space
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Solid (characteristics)
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*Fixed shape
*Fixed volume *Strong attractive forced |
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Liquid (characteristics)
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*No fixed shape
*Fixed volume *Moderate attractive forced |
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Gas (characteristics)
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*No fixed shape
*No fixed volume *No attractive forced |
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_________ can be crystalline or amorphous.
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Solids
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Crystalline
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Regular, uniform arrangement
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Amorphous
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Irregular arrangement
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Solid to Liquid
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Fusion
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Liquid to Gas
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Vaporization
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Gas to Solid
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Deposition
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Liquid to Solid
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Freezing
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Gas to Liquid
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Condensation
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Solid to Gas
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Sublimation
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Pure substance
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Matter that has a fixed composition of a single type of atom or element
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Element
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Simplest type of matter with unique physical and chemical properties
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Compound
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Matter composed of two or more types of atoms that are chemically bonded
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Mixture
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Matter without a fixed composition
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Homogenous
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Uniform composition throughout
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Heterogenous
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Nonuniform composition
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Five separation methods
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*Decanting
*Distillation *Filtration *Magnetism *Chromatography |
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Decanting
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Pouring a layered solution or mixture
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Distillation
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Separation of a liquid based on different boiling points
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Filtration
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Passing the mixture through a medium that selectively retains particles
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Magnetism
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Separation based on magnetic attraction
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Chromatography
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Separation based on different affinities for a stationary phase
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