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Slide Notes

The purpose of this slide deck is to guide students in the process of constructing the proper apparatus necessary for performing a cell membrane simulation using soap bubbles.

I am a high school biology teacher and this was a lab we did in class.

My students loved it!

Cell Membrane Bubble Lab

Published at Nov 18, 2015
A pictorial describing the method for setting up the apparatus necessary for performing the cell membrane bubble lab.

PRESENTATION OUTLINE

CELL MEMBRANE

SOAP BUBBLE LAB
The purpose of this slide deck is to guide students in the process of constructing the proper apparatus necessary for performing a cell membrane simulation using soap bubbles.

I am a high school biology teacher and this was a lab we did in class.

My students loved it!

MATERIALS

AND PROCEDURES

YOU'LL NEED THESE

TO MAKE THE BUBBLES
900ml of water
100ml of dish soap
25ml of corn syrup
four straws
shallow tray
roll of thread
ball of string or twine

GRAB FOUR BENDABLE STRAWS

COLLECT THEM ALL

BEND THE STRAWS AND CRIMP THE SHORT ENDS

ARRANGE THE STRAWS LIKE THIS

SLIDE THE SHORT ENDS INTO THE LONG ENDS

BUBBLE FRAME IS COMPLETE

BUBBLE FRAME

ALTERNATE METHOD

CUT STRAWS BELOW ELBOWS

STRAWS SHOULD BE ABOUT 5 1/2"

RUN A 30" STRING THROUGH STRAWS

TIE A KNOT HERE

MAKE THE KNOT TIGHT

CUT THE LOOSE ENDS

CUT THE LOOSE ENDS

ALTERNATE VIEW

CHOOSE YOUR FRAME

GRAB SOME THREAD

TIE LOOP TWO FINGERS WIDE

THE RING IS READY

The ring of thread is used to create a channel through the bubble film. The frame is lifted from the tray of bubble solution so that a thin film spans across the frame. Students gently lay the ring of thread onto the bubble film. The students then take something dry, like the tip of a pencil, and pop the film inside the ring. To their amazement, the string pops into a perfect circle that floats across the film within the frame. This is used to illustrate channel proteins that create passageways across cellular membranes.

BUBBLE RECIPE

900ML WATER

100ML DISH SOAP

25ML CORN SYRUP

MIX SOLUTION

POUR IN SHALLOW PAN SUCH AS A CAFETERIA TRAY

MAKE BUBBLES

A more detailed explanation of this lab can be found here.

http://www.clearbiology.com/cell-membrane-bubble-lab/