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Chapter Three: Tools

TermDefinition
Metric system A system of measurement based on the number 10
International system of units a system of units used by scientist 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 approximate 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 measurements are to eachother
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 most often in a list of numbers
range The difference between the greatest value and the least value in a set of data
anomalous data Data that do not fit with rest of data set
graph A picture of information from a data table shows the relationship between variables
linear graph A line graph in which the data points yield a straight line
nonlinear graph A line graph in which the data points do not fall along a straight line
Created by: user-1975220
 

 



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