1. Processing the Bubble Tube Investigation
Post Lab
Processing the
Bubble Tube Investigation

2. 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’

3. 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?

4. 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

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

6. 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?

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

8. 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