Plastic Beakers
Graduated Cylinder
Transfer PipettesLife Science Lab - Membranes
Recommended Grade Level: Middle School
Instructions
This is a great lab to demonstrate how certain molecules are small enough to cross through certain barriers while others are not. Using several simple supplies, this lab could be a great activity for your life sciences class, or a good science fair project. This lab demonstrates the porous nature of certain materials commonly found in nature.
Begin by gathering all of the materials needed to make this laboratory a success. You will need a plastic sandwich bag with either a zip top or a twist tie. Additionally, you will need iodine solution, cornstarch, (2) 500 ml beakers, a transfer pipette and one graduated cylinder. We recommend that you also use disposable lab safety gloves to prevent staining your hands with the iodine solution.
As always, be sure to monitor your students or children during any laboratory activity.
Other Science Fair Videos:
- Chemistry Project: pH Balance Lab
- Biology Project: Collecting Bacteria Lab
- Earth Science Project: Porosity
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