chemistry - chapter 1
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30 Terms
matter
anything with mass and volume
element
matter composed of 1 type of atom
compound
2 or more atoms bonded together
heterogenous mixture
2 or more elements/compounds mixed together without uniform composition
homogenous mixture
2 or more elements/compounds mixed together with uniform composition
decanting
pouring a liquid from a solid and other unsolvable liquid
distillation
used to separate mixtures that are composed of 2 or more pure liquids
filtration
used to separate unsolvable solids from liquids
physical change
a reversible change to a substance
chemical change
an irreversible change to a substance
extensive property
physical property that is dependent on amount
intensive property
physical property that is independent on amount
chemical property
describes how a substance behaves
metric system
system of measurement used in most countries, based on a factor of 10
SI
modern form of the metric system
English system
system of measurement used in the US
mass
amount of matter in an object
weight
measure of the force of gravity acting upon an object
volume
how much space an object takes up
density
a measurement of how much stuff is packed into a certain amount of space
derived unit
a unit of measurement that is created by combining base units of a measurement system
significant figures
the digits in a number that indicate its precision
certain numbers/values
the numbers in a measurement you are certain of
estimated numbers/values
the numbers in a measurement you are not certain of
accuracy
how close a number is to the accepted value
precision
how close the numbers in a data set are to each other
random error
error that has an equal probability of being too high or too low
systematic error
error that is consistently too high or too low
dimensional analysis
the use of units as a guide to solving problems
conversion factor
fractional quantity with the units we are converting from on the bottom and the units we are converting to on the top
Note 
Flashcards (30)