scientific learning

• • varaibles: anything that can change the outcome of an experiment
• independent variables: the variable that is manipulated by the researcher to see how it affects the dependent variable
• dependent variable: the varaible that is affected by the change in the independent variable
• unit: standard way of measuring the amount of a substance in a sample or solution
• controlled variable: a variable that is kept constant throughout the experiment, so that it can be manipulated to see how it affects the dependent variable
• importance of controlled variable: to get fair results, to avoid confounding variables
• dimensional analysis: is the study of the relation between physical quantites based on their units and dimensions.
• principle of homogeneity of dimension: states that the dimension of each term of a dimension equation on both sided should be the same.