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21 terms

independent or manipulated variable-

changed on purpose usually at regular intervals; usually found in the first column (or first row) of a data table; placed on the x-axis of a graph

dependent or responding variable-

affected by the independent variable; placed on the y-axis of a graph

quantitative-

obtained by measuring or counting

qualitative-

describes, but not obtained by measuring or counting

pie graph-

AKA circle graph; shows how a whole is divided into parts (percentages)

bar graph-

used when one factor is qualitative and the other is quantitative

line graph-

used when both variables are quantitative; the most common type of scientific graph

range-

difference between the highest value and the lowest value in a data set

scale-

the numeric value for each interval (square) on an axis

column-

series of cells going up and down in a data table

row-

series of cells going across in a data table

vertical-

going up and down

horizontal-

going across (left to right); parallel to the horizon

x-axis-

horizontal axis; used for the independent variable

y-axis-

vertical axis; used for the dependent variable

graph-

used to display the data; 3 types - pie, bar, and line

data table-

used to collect (store) data; made up of rows and columns

method for calculating scale-

1. divide range by squares 2. if necessary, bump up to the next HIGHER number that is easy to work with

correlation-

describes the relationship between two variables; can be positive or negative

title-

follows the format "Effect of Independent Variable on Dependent Variable"; data table and corresponding graph should always match

label-

indicates name of variable; includes units in parentheses