Author: English
Last saved by: nicole.heath

4

Scientific Method Lab
The purpose of this lab is to use the Scientific Method to solve a problem.

Materials
	2 small pieces of wax paper
	1 meter stick
	String
	2 different pieces of bubble gum

Each group will need one piece of gum “A” and one piece of gum “B”.  Make 3 observations about each brand of gum.

Observations
Gum A						Gum B
	1.____________________________			1.__________________________

2.____________________________			2.___________________________

3.____________________________			3.___________________________

Problem: Which piece of bubble gum blows the biggest bubble?

Hypothesis: make a prediction and be sure to write it in “if, then, because” form. 
	
_______________________________________________________________________________________________

_______________________________________________________________________________________________

Procedure:
1.  One partner will chew gum “A” for 3 minutes.  The same person will chew gum “B” once all the tests on brand A are completed.  
2.  Blow a bubble.
3.  Using a string, your partner will measure the diameter (distance across) the bubble.  Put the string on the meter stick to measure the distance in centimeters (cm).
4.  Record the measurement in a data table.  Blow 2 more bubbles and measure (you should complete a total of 3 trials
5.  Find the average bubble size for brand A (add all the distances up and divide by 3) and record in the data chart.
6.  Repeat steps 1-5 with “B” gum.

Data Table: Design a data collection table to fit the data you will be investigating

Conclusion: What brand of gum blows the biggest bubbles and why?  Support your answer with observations and data.
______________________________________________________________________________________________________________________________________________________________________________________________

Combine with the rest of your table to complete this part of the lab.

Problem: How does gum strechability relate to bubble size?

Hypothesis: make a prediction and be sure to write it in “if, then, because” form
______________________________________________________________________________________________________________________________________________________________________________________________
Procedure:
	1.  Roll gum “A” into a ball.
2.  Hold gum “A” by using the piece of wax paper.  Another person in the group will hold the same piece of gum with another piece of wax paper.  Hold the gum near your chest, begin to walk slowly backwards.
3.  A third person in the group should hold the meter stick and measure the distance in centimeters the gum stretched before breaking.
4.  Record the measurement in the data chart. ONLY DO ONE TRIAL
5.  Repeat #1-4 for brand B gum.

Data Table: Create a data table to fit the data you will be gathering. Combine and average your data for the whole table.

Conclusion:
How does gum stretchability relate to bubble size?
______________________________________________________________________________

______________________________________________________________________________

List 3 variables that may affect the outcome of this experiment.
1. ____________________________________________________________________________

2. ____________________________________________________________________________

3. ____________________________________________________________________________
Explain how the data you collected can be described as both qualitative and quantitative
_______________________________________________________________________________________________