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Glossary of chemistry chapters 1-2.5

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chemistry
the science of the compsition, structure, properties, and the reactions of matter, especially of atomic and molecular systems
scientific method
collect the facts or data, formulate a hypothesis, pl,an and do additional experiments to test the hypothesis, modify hpyothesis
hypothesis
tentative explanation of certain facts that provides a basis for further experimentation
theory
explanation of the general principles of certain phenomena with considerable evidence or facts to support it
scientific laws
simple statements of natural phenomena to which no exceptions are known under the given conditions
mass
a fixed and unvarying quantity that is independent of the objects location
weight
measure of the earths gravitational attration for that object
rounding off numbers
when digits are dropped from a number, the value of the last digit retained
scientific notation
writing a number as a power of 10
significant figures
every number that expresses a measurement

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