Student Instructions – Do Not Write on This Sheet Bubble Gum Density Have you ever been in trouble in school for chewing gum? Have you ever taken your bubble gum out and played with it? (If you said no, you don’t have a very good memory!) In this lab, you get to have your bubble gum during class, and “play” with it too! Here’s What to Do: A- Form a group of 3 or 4 people. B- Get a worksheet for each person in your group C- Go get a piece of bubble gum (with wrapper) for each student. D- Identify the location in the room of a nearby triple beam balance and graduated cylinder. E- Identify a nearby clock with a second hand or a timing device F- Fill in the blanks on your worksheet to design your own mini-experiment that answers the question, “What are the effects of chewing on bubble gum density? G- Designate one person from your group to check your experimental design with the teacher before you proceed. Do not start with your experiment without your teacher’s approval. H- Get going with your experiment, but first, here are some things to remember: Remember to record data on your data table for each person in your group - this is like repeating the test to verify results. Remember to test only one thing at a time, and keep all of the other variables constant. Remember to label your data chart and your graph Bubble Gum Density Student Name ____________________ Period _______ Score______/40 With your group, design your own experiment to answer this question… Question: What are the effects of chewing on bubble gum density? Hypothesis: (1 pt) If the bubble gum is chewed for 5 minutes, then the density of the chewed gum will __________________ because _______________________________________. Materials : one piece of Hubba Bubba bubble gum for each person, one gum wrapper, a triple beam balance, a graduated cylinder, a clock, a calculator, water, a ruler, a test subject Procedure: (10 pts) Step 1 Gather materials Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Independent Variable 1 pt (The thing we are testing) ___________________________ Dependent Variable 1 pt(The outcome that we are measuring) _____________________________________ Constants 2 pts pts (Stay the same for all trials) __________________________________________ Comparison group: 1 pt Our group will compare the density of gum ________________________ and the density of gum ___________________________________________ Test Mass Volume Density Mass Volume Density Subject Before Before Before After After After Names Chewing Chewing Chewing Chewing Chewing Chewing 1 2 3 4 Average Density before Chewing ____________ Average Density After Chewing____________ (15 pts) Sum up your results with one sentence: 1 pt __________________________________________________ Conclusion: (Put these all together in paragraph format) 5 pts A: restate the question B: restate the hypothesis C. tell what happened D. was the hypothesis supported? Analysis: (Look at your data and answer the following questions) A. Did the volume of your gum change significantly? Did the mass of your gum change significantly? B. How did these changes affect the density? E. Do you have a guess at what caused your observed changes? Explain.