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Glossary of Chapter 2 Vocabulary Chem

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absolute zero
the temperature at which all molecular motion theoretically stops
accuracy
closeness of a single measurement to the actual dimension or true value of a quantity
base unit
fundamental defined unit of measurement
energy
(joule) (J) the capacity to do work
fixed point
a reproducable natural phenomenon
force
(Newton) (N) a push or pull
heat
(joule) (J) a form of energy that flows from areas of high temperature to areas of low temperature
length
(meter) (m) the straightline distance between 2 points
mass
(kilogram) (kg) (gram) (g) the amount of matter in a substance
precision
the closest of several measurements made in teh same way to each other
qualitatve data
-gives results in a descriptive non-numeric form

-word description
significant digits
all the digits in a measurement known with certainty plus the first uncertain digit
temperature
(kelvin) (K)
-the relative hottness or coldness of a substance

-the relative heat content of a substance
time
(second) (s) interval between two events
volume
(liter) (L) amount of space a substance takes up
quantitative data
-gives results in a definite form with numbers

-measurements
weight
(Newton) (N) measure of the pull of gravity on a substance

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