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Chapter 1
vocab [Chang's 9th ed.]
29
Chemistry
10th Grade
09/22/2010

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Term
accuracy
Definition
how close a measurement is to the true value of the quantity that was measured
Term
chemical property
Definition
any property of a substance that cannot be studied without converting the substance into some other substance
Term
chemistry
Definition
the study of matter and changes it undergoes
Term
compound
Definition
a substance composed of atoms of two or more elements chemically united in fixed proportions
Term
density
Definition
the mass of a substance divided by its volume
Term
element
Definition
a substance that cannot be separated into simpler substances by chemical means
Term
extensive property
Definition
a property that depends on how much matter is being considered
Term
heterogeneous mixture
Definition
the individual components of a mixture remain physically separated and can be seen as separate components
Term
homogeneous mixture
Definition
the composition of a mixture, after sufficient stirring, is the same throughout the solution
Term
hypothesis
Definition
a tentative explanation for a set of observations
Term
intensive property
Definition
a property that does not depend of how much matter is being considered
Term
International System of Units (SI Units)
Definition
a system of units based on metric units
Term
kelvin
Definition
the SI base unit of temperature
Term
law
Definition
a concise verbal of mathematical statement of a relationship between phenomena that is always the same under the same conditions
Term
liter
Definition
the volume occupied by one cubic decimeter
Term
macroscopic property
Definition
properties that can be measured directly
Term
mass
Definition
a measure of the quantity of matter contained in an object
Term
matter
Definition
anything that occupies space and possesses mass
Term
microscopic property
Definition
properties that cannot be measured directly without the aid of a microscope of other special instruments
Term
mixture
Definition
a combination of two or more substances in which the substances retain their identity
Term
physical property
Definition
any property of a substance that can be observed without transforming the substance into some other substance
Term
precision
Definition
the closeness of agreement of two or more measurements of the same quantity
Term
qualitative
Definition
consisting of general observations about the system
Term
quantitative
Definition
comprising numbers obtained by various measurements of the system
Term
scientific method
Definition
a systemic approach to research
Term
substance
Definition
a form of matter that has a definite or constant composition (the number and type of basic units present) and distinct properties
Term
theory
Definition
a unifying principle that explains a body of facts and the laws that are based on them
Term
volume
Definition
the length cubed
Term
weight
Definition
the force gravity exerts on an object
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