In the experiments are the factors that affect the experiment. These factors are called variables. There are four kinds of variables:
a. Independent variable or variables manipulative
Are different factors that made intentional or modified.
b. Dependent variable or response variable
Is the variable obtained by other variables.
c. control variables
Is a variable that must be controlled.
d. variables Bullies
Are factors that can affect the results of trial, but can not be predicted in advance.
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