Name: Pd

TOWEL TESTING

Background: Many brands of towels claim that they are the strongest. Research is needed to determine which brand of really is the strongest. Is really a better option or do the other brands do just a well and cost less? Since paper towels are usually wet when they are being used the "" of the towel is important. Wet strength is the strength of paper when it is wet. This can be measured by the amount of mass that a wet paper towel can hold. Some things to think about before beginning are: what are your variables?, what are you going to observe and measure, how will you do the measuring?, and how many trials will you have?.

Task: To design an experimental investigation (a fair test) to test the strength of three different brands of paper towels. You will have the following materials to conduct the experiment: Bounty towels, Makers Mark from Sam's Club towels, and Boulder Ultra towels. Graduated cylinder/beaker, weights, red cup, rubber band, water, pipette, triple beam balance.

1. Problem:

2. Research:

3. Hypothesis:

4. Experiment: A. Independent Variable: B. Dependent Variable: C. Constants: (at least 3)

D. Control Group: E. Matrials (bulleted list)- be specific with quantity

F. Procedures: 1. Obtain all materials 2. Make data chart to record all data 3. Place paper towel over top of cup and secure with rubber band around top 4. Place ml of water onto towel 5. Place weights onto towel until towel breaks, record the mass the towel held prior to breaking. 6. Pour water back into beaker to reuse, throw used wet towels in trash. 7. Repeat steps 3-5, 2 more times for this brand. 8. Repeat steps 3-6 for other 2 brands of towels. 9. Clean up all materials and return to lab table and dry and clean up desk area. 10. Analyze data

5. Data/Results: (include a place for your average) after analyzing data make a graph of your averages. Remember DRY, MIX and TAILS, (use graph paper) Explain what type of graph you will use and why. Data/Results continued: What type of graph will you use and why?

Analyze Data: What story does your graph tell? What do you know about the effect of the independent variable on the dependent variable?

6. Conclusion: a. Answer your problem question.

b. Accept or reject your hypothesis and explain why?

c. What can you do to improve or change with this experiment?