Processing the Bubble Tube Investigation Post Lab Processing the Bubble Tube Investigation

TWO independent variables The Question – Does the angle of the tube affect the time it takes the bubble to move from one end of the tube to another? TWO independent variables ANGLE of tube COLOR of liquid in tube ONE dependent variable Time or speed Controlled variables Same timer, same ‘flipper’

The Design What was being changed? How was it being changed? What was being measured? How was it being measured? How many trials were done?

Data Collection IV 1 – color of tube Title IV 2 – Angle of the tube Place to record data or dependent variabls Place to record data or dependent variable

Data Analysis Reduce the data Measures of central tendency Mean Median Mode Range Frequency

Data Analysis Look patterns of change As angles decrease, what happens to the time? Is this true for all angles? As angles increase, what happens to the time? What kind of comparison can you make with the colors of the tubes?

Graphing the Reduced Data Line graphs show us change or trends Why was a line graph an appropriate graph for our data?

Drawing Conclusions Data will support or not support your hypothesis Hypothesis is rejected or accepted Never ‘right’ or ‘wrong’ Answer the original question Use evidence (data) to back up what you say