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Science Chapter 3

TermDefinition
metric system A system of measurements 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 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 each other.
significant figures All the digits in a measurement that have been measured exactly, plus one digit whose value has been estimated.
percent errors 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 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 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-1975215
 

 



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