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chapter 3

TermDefinition
metric system a system of measurement based on the number 10.
SI (international system of units) 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 volume
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 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 highest and the lowest values in a data set.
anomalous data Observations or data points that deviate from significantly from the expected pattern or norm.
graph A visual representation of data that shows the relationship between two or more variables.
linear graph A strait line on a graph that shows a relationship between two variables where one changes at a constant rate as the other changes .
nonlinear graph A relation ship where the rate of change is not constant , resulting in a curved line instead of a straight one.
Created by: user-1975254
 

 



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