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chapter 3

TermDefinition
metric system A system of measurement based on the number 10
SI/ international system of units A system of units used by scientists to measure the properties of matter
mass a measure of how much matter is in an object
weight a measure of the force of gravity acting on an object
volume the amount of space that matter occupies
meniscus the curved upper surface of a liquid in a column of liquid
density the measurement of how much mass of a substance is contained in a given volume
estimate an approximation of a number based on reasonable assumptions
accuracy how close a measurement is to the true or true accepted value
precision how close a group of measurements are to each other
significant figures all the digits in a measurement that have been measured exactly, plus one digit whose value has been estimated
percent error a calculation used to determine how accurate, or close to the true value, an experimental value really is
mean the numerical average of a set of data
median the middle number in a set of data
mode the number that appears the most often in a set of numbers
range the difference between the greatest value and the least value
anomalous data data that do not fit with the rest of a data set
graph a picture of information from a data table; shows the relationship between variables
linear graph a graph in which the data points yield a straight line
nonlinear graph a line graph in which the data points do not fall in a straight line
Created by: user-1975227
 

 



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