Presentation on theme: "Using dialysis tubing. You and your team wish to demonstrate through a carefully thought-out lab procedure that certain substances may or may not pass."— Presentation transcript:
Using dialysis tubing
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.
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
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.
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.
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
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.