Matter and Measurements
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each of the black spaces below before clicking
on it to display the answer.
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| A systematic approach to research | Scientific Method
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| A tentative explanation for a set of observations | Hypothesis
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| A concise statement of a relationship between phenomena that is always the same under the same conditions | Law
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| A unifying principle that explains a body of facts and/or those laws that are based on them | Theory
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| Anything that occupies space and has mass | Matter
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| A form of matter that has a difinite composition and distinct properties | Substance
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| Composition of the mixture is the same throughout | Homogenous Mixture
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| Composition is not uniform throughout | Heterogeneous
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| Means can be used to separate a mixture into its pure components | Physical
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| A substance that cannot be separated into simpler substancesby chemical means | Element
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| A substance composed of atoms of two or more elements chemically united in fixed proportions | Compound
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| Does not alter the composition or idnetity of a substance | Physical change
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| alters the composition or identity of the substance involved | Chemical change
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| Depends on how much matter is being considered | Extensive property
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| Does not depend on how much matter is being considered | Intensive property
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| Mass/Volume | Density
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| how close a measureent is to the true value | Accuracy
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| how close a set of measurements are to each other | precision
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| all the digits in a measurement that are known with certainty plus a last digit that must be estimated | significant figures
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| Matter is neither created nor destroyed | Law of Conservation of Mass
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| A given compound always contains the same relative numbers and kinds of atoms | Law of Constant Composition
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| Different ratioes of the numbers and kinds of atoms give rise to different compounds | Law of Multiple Proportions
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| Measured mass/charge of electrons | Thompson
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| Measured mass of electron | Millikan's Experiment
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| Protons have opposite charge of electrons | Rutherford's E.
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| determined atomic # | Moseley
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| electrons pass from the cathode to the anode | cathode ray tube
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| determined the magnitude of the electric charge of the electron | Millikan
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| Measured the charge to mass ratio e/m | Thomson
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| developed the nuclear model of the atom | Rutherford
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| Established that protons are not evenly distributed throughout an atom | Gold Foil E.
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| Neutrons | Chadwick
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| compounds that have a certain number of water molecules attached to them | hydrates
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Created by:
JessieKincer
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