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Unit 1 Vocablulary

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cimoscience's version from 2017-06-06 14:57

Section 1

Question Answer
Chemistrythe study of the composition of matter and the changes that matter undergoes
Scientific Methoda logical, systematic approach to the solution of a scientific problem; steps include making observations, testing hypotheses, and developing theories
Observationinformation obtained through the senses
Inferencea conclusion drawn from evidence and reasoning
Hypothesisa possible explanation for an observation
Experimenta repeatable procedure that is used to test a hypothesis
Qualitative Datadescriptive observations; color
Quantitative Dataobservations involving measurements; numbers
Modela representation of an object or event
Scientific Theorya well-supported explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment
Scientific Lawa concise statement that summarizes the results of many observations and experiments
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Section 2

Question Answer
Scientific Notationan expression of numbers in the form of m x 10^n, where m is equal to or greater than 1 and less than 10, and n is an integer
Significant Figuresall the digits that can be known precisely in a measurement, plus a last estimated digit
Accuracythe closemenss of a measurement to the true value of what is being measured
Precisiondescribes the loseness, or reproducibility, of a set of measurements taken under the same conditions
Percent Errorthe percent thaat a measured value differs from the accepted value
Accepted Valuea quantity used by general agreement of the scientific community
Experimental Valuea quantitative value measured during an experiment
International System of Unitsthe revised version of the metric system
Temperaturea measure of the average kinetic energy of particles in matter; determines the direction of heat transfer
Densitythe ratio of the mass of an object to its volume
Conversion Factora ratio of equivalent measurements used to convert a quantity from one unit to another
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