Activity #2: Bubble Membranes

Materials:  straws, glycerine, soap, water, bowls/trays, string.

Part 1: Carefully view the below video to get a general idea of what will you do in this activity. 

Part 2: Click here and carefully follow the instructions in the “Bubble Cell Membrane” document. Document your observations in your workbook.  

Part 3: Why do you think the bubble membrane remained intact when coated with a soapy solution but burst when touched with a dry object? Relate this to the hydrophobic and hydrophilic nature of cell membranes. Clearly explain your logic in your workbook.