scientific method

• The independent variable is the variable changed on purpose during an experiment.
• the dependent variable is the variable that quantifiably changed in response to the independent variable, it is counted or measured.
• controlled variables are the variables kept constant in an experiment to ensure that only the independent variable influences / changes the dependent variable
• Explain why continuous data should be displayed in a line graph?

  If the IV is continuous then a line graph should be used as it allows scientists to make better predictions of values that fall in-between the data. Bar graphs do not allow for clear predictions of values that fall between values as bar graphs are used for discrete data that is grouped into categories with no values that fall between the data.
• SIC DR

  SSS - set up, sizes and similarity

  IV-How will the iv differ

  CV - what is controlled

  Dv - when and how you will measure the DV

  R - repeat
• POSARP

  Personal errors, outliers, systematic errors, accuracy, random errors, precision
• validity


  how well the experimental production of results or conclusion that address the aim
• reliability


  a methods ability to get the same repeated results
• A line graph as the independent variable is continuous and quantitative this allows us to predict values that fall in-between the data.
• line graph as both the independent and the dependent variables are continuous therefore a line graph allows us to make prediction of values that fall in between the data.
• A Bar graph, the independent variable is discontinuous and qualitative, a bar graph shows this by grouping the data into separate catergories.