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35 Cards in this Set
- Front
- Back
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Accuracy
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The agreement of a particular value with the true value
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Chemical Change
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Reorganization of atoms to form a new substance
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Chromatography
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Method of separating mixtures by employing a system with a mobile phase and a stationary phase
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Compound
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A substance with constant composition that can be broken down into elements
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Density
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A property of matter representing the mass per unit volume
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Distillation
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A method of separating the components of a liquid mixture that depends on differences in the ease of vaporization of the components
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Element
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A substance that cannot be broken down into a simpler substances
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Exponential Notation
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A convenient method for representing very large or very small numbers
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Filtration
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A method for separating a mixture that contains a liquid and a solid
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Hypothesis
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One or more assumptions put forward to explain the observed behavior of nature
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Law of Conservation of Mass
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Mass is neither created nor destroyed
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Mass
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The quantity of matter in an object
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Theory (Model)
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A set of assumptions put forward to explain the observed behavior of matter
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Natural Law
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A statement that expresses generally observed behavior
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Physical Change
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A change in the form of a substance, but not in its chemical composition.
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Precision
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The degree of agreement between several measurements of the same quantity
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Pure Substance
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A substance with constant composition
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Random Error
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An error that has an equal probability of being high or low
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Scientific Method Steps
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Make an observation, create hypotheses, and perform the experiment
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SI System
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International System of units based on the metric system
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Significant Figures
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The certain digits and the first uncertain digit of a measurement
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Solution
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A homogenous mixture
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States of Matter
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Phases of matter (solid, liquid, gas)
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Systematic Error
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An error that always occurs in the same direction
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Theory
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A set of assumptions put forward to explain why the observed behavior happened
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Uncertainty
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Any measurement involves estimates and cannot be exactly reproduced
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Unit Factor Method
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Equivalence statement between units used for converting from one unit to another
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Weight
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The force exerted by an object by gravity
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Quantitative
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Has a number
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Qualitative
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Describing something, no number (exp. the color of something)
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Solid
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Fixed volume and shape
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Liquid
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Fixed volume but no definite shape
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Gas
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No fixed volume or shape, takes on the shape and volume of its container
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Homogeneous
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Having visibly indistinguishable parts
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Heterogeneous
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Having visibly distinguishable parts
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