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Chapter 2
Data Analysis
15
Chemistry
10th Grade
08/27/2007
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Term
base unit
 Definition
measurement based on an object in the physical world
Term
second
 Definition
SI base unit of time
Term
meter
 Definition
SI base unit of length
Term
kilogram
 Definition
SI base unit of mass
Term
derived unit
 Definition
combination of base units
Term
liter
 Definition
metric unit for volume
Term
density
 Definition
ratio of an object's mass to volume
Term
kelvin
 Definition
SI base unit of temperature
Term
scientific notation
 Definition
a number between 1 and 10 raised to a power
Term
conversion factor
 Definition
ratio of equivalent values
Term
dimensional analysis
 Definition
method of problem-solving based on units
Term
accuracy
 Definition
closeness to an accepted value
Term
precision
 Definition
closeness to a series of measurements
Term
percent error
 Definition
ratio of an error to an accepted value
Term
significant figures
 Definition
all known plus one estimated digit
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