Semipermeable Membranes

This week we studied the cell some more. Specifically that it has a semipermeable membrane. We made naked eggs (the scandal.)

And we put corn starch into water with iodine, but this didn't work like it has for me in the past. I guess my plastic was too high quality. The iodine was supposed to be able to go through the plastic and into the cornstarch, changing it to dark blue, but it didn't.

Oh well,