Osmosis & Diffusion

Today we reviewed osmosis, diffusion and facilitated diffusion.  To see animations of each of these types of molecular movement check out these links:  osmosis, diffusion or facilitated diffusion

from: http://www.glogster.com/media/5/32/61/40/32614024.jpg

Tomorrow we will be talking about experimental design.  You will need to design an experiment that addresses the ONE of following questions:

How do different concentrations of a specific solution affect the rate of osmosis in potatoes?

OR:

How do different concentrations of a specific solution diffuse across a semi permeable membrane?

You have been emailed a series of documents (which you will also receive in class) that help you to plan out your experiment.

When you come to class tomorrow you need to have:

A hypothesis
Identified the independent variable
Identified the dependent variable
A list of things that you will need to control in this experiment

I can not emphasize this point enough:
You must complete this on your own.  You may do any research you like (CITE YOUR SOURCES!), however you can NOT work with a partner!