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Chapter 3

QuestionAnswer
Metric System A system of measurement based on the number 10
SI 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 accepted value
precision How close a group of measurement are to each other
significant figures All the digits in a measurement that have been measured exact, plus one digits 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 most often in a list of numbers
range The difference between the greatest value and the least value is a set of data
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 line graph in witch the data points yield a straight line
nonlinear graph A line graph in witch the data points do not fall along a straight line
Created by: Arianna Okete
 

 



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