1. Using dialysis tubing

2.  You and your team wish to demonstrate through a carefully thought-out lab procedure that certain substances may or may not pass through dialysis tubing. But which substances might that be?  Dialysis tubing is thin, plastic-like material that can be tied into small bags. It has pores so small that certain larger molecules can’t pass through it.

3.  Here’s what you have to use today:  Beakers/tape/markers  Tap water  Starch-water solution  Glucose-water solution  Iodine (tests for starch)  Diastix (tests for simple sugars)  String  Dialysis tubing  Droppers

4.  Based on what you know about cell transport, diffusion, and the materials you’ve been given today, develop a hypothesis statement that your procedure will attempt to uphold.  Remember to use the hypothesis style we’ve learned from our experimental design guide.

5.  Come up with a procedure that will demonstrate how some substances may move through the dialysis tubing while some may not. This procedure should be able to validate your hypothesis.  Procedures are detailed. Some other group in another school should be able to read your procedure and reproduce the exact experiment.

6.  Create a data table that reflects data you record.  Note: This procedure may run overnight. You will have time tomorrow to collect results. lskdnlnlknlnxcvzcsrtvx xcv vbv

7.  Write an analysis paragraph that interprets what your data shows.  Explain why your results are what they are.  State whether your original hypothesis statement has been upheld or refuted.  Note: Collaborate with your partner(s). Their grade is your grade.