Class Information about Diffusion and Osmosis

This week you learned about diffusion and osmosis. We told silly stories to get the point across. Here are some pointers that you should keep in mind when thinking of these two processes.

Diffusion deals with concentrated particles moving from a higher concentration to a lower concentration.

examples: —-diffusion of blue food coloring through water

—-when iodine was dropped in water and traveled through the plastic baggies to turn the rice black

Osmosis is the diffusion of WATER across a semi-permeable membrane from a higher concentration to a lower concentration.

—-We soaked eggs in vinegar to dissolve the shell off each egg so that the membrane in exposed. We measured the weight of the egg to determine the mass and then we covered the eggs in corn syrup overnight. You measured the egg today after draining the corn syrup off. Think about what caused the egg to decrease in weight. How will the weight change when your egg is covered with distilled water?  This is the process of osmosis—-water is traveling through the the semi-permeable membrane of the egg.

Read about the Cell Cycle this weekend—I will make it really nice for you if you can answer questions next week—–We will learn about how cells divide. It’s amazing to learn how we are created by a single cell that divides until cells make tissue and tissue makes organs and organs make organ systems and organ systems make  an organism!!!!! You are one in a million. Who wants to hear me sing this beautiful song. haaa-haaaa

Short URL: http://chandadavis.net/?p=1115