1. Conducting an experiment and collecting data using product testing
Wednesday, September 4, 2012
Conducting an experiment and collecting data using product testing

2. Content Purposes
Develop personal responsibility while collecting and analyzing data.
Perform common calculations required for data analysis.
Differentiate the control group and experimental group in a controlled experiment.
Understand that scientific investigations involve inference and logical reasoning based on evidence and previous knowledge.

3. Language Purposes Use the following sentence frames:
“Overall, the data shows …”
“My hypothesis, , was correct/incorrect because…”
Use scientific vocabulary (SI Units, meters, centimeters, milliliters, grams).
Use the following terms significant digits, rounding, and percentages. Ask your partner, “Can you tell me how you rounded that?”

4. PWG Outcome Record results in a group data table and write:
a summary statement about the data
a conclusion statement about the hypothesis
With your group, collect accurate measurements at each measurement station: length, mass, volume.
Calculate the percentage. With a partner, compare the results reached after rounding or not rounding.

5. Product Testing Experiment
Today we will do a lab. Let’s review the lab safety required to do this lab:
1. Do not eat anything in the lab
2. If you have sensitive hands, you may wear gloves. However, the materials are non-toxic.
3. Clean up
4. Report any broken glass immediately
5. No horseplay
6. Keep voices quiet

6. Glubber Formula Key Question: In this investigation you will:
What is the best formula to use to make Glubber?
In this investigation you will:
compare and contrast properties of matter.
recommend a product formula based on experimental data.
Key Vocabulary:
Chemical Change: The interaction with substances combine to form a new substance.
Precipitate: A new solid that forms when two liquids are mixed together.
Polymer: A polymer is a chemical compound formed from long chains of the same molecule group, repeating over and over.
Graduate: to separate equally (graduated cylinder)

7. Glubber Formulas Day one Directions:
Prepare three different formulas of Glubber, using water,
glue and a saturated Borax solution –
Use the zip lock bags to keep your formulas in.
DO NOT POUR GLUE into the GLASSWEAR! Use a graduated cylindar with water only to mark with following lines 10 ml, 20 ml, 30 ml, 40 ml on your paper or plastic cup for the glue.
Use plastic spoons to stir mixtures.
Once formulas are mixed, put each one in a separate bag and mark the glasses A, B, or C depending upon the formula used with a piece of tape.
Allow free exploration with each formula.
Write observations down on your lab sheet (each person write).
FORMULA A
20 ml glue
20 ml water
40 ml of borax solution
FORMULA B
30 ml glue
10 ml water
FORMULA C
40 ml glue
0 ml water

8. Glubber Formula Problem:
Which formula is best for a new product. Conduct the
tests to find out.
Bounce Test
Drop each Glubber from a height of 100 cm. How high does the Glubber bounce? Sequence the formulas from highest bounce (1) to lowest (3).
Shape Test
Roll Glubber into a ball. Does it retain its shape? Sequence the formulas from best shape retention (1) to least shape retention (3).
Imprint Test
Use large paper clips to make an imprint in the Glubber. How long does the imprint last? Sequence Glubber from longest (1) to shortest (3).
Stretch Test
Roll the Glubber into a 20 cm rope. Pull the rope until it snaps. How long was each rope. Sequence formulas from longest rope (1) to shortest rope (3).
Print Transfer Test
Draw three simple marker designs on white paper. Press Glubber on the designs. Which formula transferred the design the best. Sequence formulas from best (1) to poorest (3).
Record
Create a data chart to record your findings.
Use your results to answer questions on slide 11 in your science journal.

9. Glubber Formula A B C Average Bounce Test Shape Test Imprint Test
Stretch Test
Transfer Test
Once you have collected the data, create a graph to help you decide upon the best formula. Remember the smallest number/shortest bar is the best formula.

10. Glubber Formula
1. What evidence do you have that a chemical reaction has taken place when you mixed the glue and borax solutions?
2. How did your group decide upon the best formula?
3. Why is it important to base product decisions on experimental data?
4. The Glubber you made is a polymeric solid. It is made up of long chains of molecules wrapped around each other. What evidence did you observe while mixing the two solutions that chains were forming?
Answer these questions in your science journal.

11. Glubber final activity
Summary
Use a Piece of colored paper. On the left hand side, give a written summary on which formula you recommend based on the results of the experiments. Ad
On the right side of the colored paper, design an ad to sell your product. Use the properties of the Glubber as a selling feature.