Diffusion is the movement of particles moving from a high concentration to a low concentration. For example, if you drop a drop of food coloring into water, the food coloring will stay in one place shortly. That place currently has a high concentration of food coloring. But as time goes by, the food coloring will move around and dissolve in the water until everywhere in the water has an equal amount of food coloring in it. Osmosis is the kind of the opposite of diffusion. Osmosis is when particles move from a low concentration to a high concentration. For example, imagine that you have a bag. That bag is filled with water and a little bit of salt. If you put that bag into a jar of water that has a lot of salt in it, the salt from the bag will move out of the bag into the jar with more salt. The bag with a lower concentration of particles move into a higher concentration of that particle. The opposite happens when there is less salt in the outside and more salt in the inside.
SP6 - Constructing Explanations and Designing Solutions:
This week, I mostly explained things such as the photosynthesis cycle instead of designing solutions. I explained how photosynthesis and respiration work together to function through creating a fold able of the two processes. One half of the fold able said the name of the process, the important information about it such as the function, organelle the process happens in, and the formulas for the products and reactants. Another thing that was added in the fold able was an illustration which explained what starts the process, what the outcome is of the processes, and how both processes work together. I also filled out a worksheet explaining the outcomes of scenarios using Osmosis and Diffusion, such as "If you put a bag of 97% water and 3% salt into a Beaker with 90% water and 10% salt, where will the water move?". I explained how osmosis and diffusion play roles in scenarios such as the example.
XCC - Scale, Proportion, Quantity:
One thing I noticed this week was that Diffusion and Osmosis depend on the quantity of the concentrations of the solvents and solutes and the size of the item that is hosting the solvents and solutes. Think back to that food coloring and water example in the summary. In that case, the food coloring dissolved until it was equally spread around the jar of water. If it was tried in real life, you could see that after the food coloring was dissolved in the jar of water, the water turned into the color of the food coloring dropped in. Now instead of having a jar of water, what if you added a drop of food coloring into a lake? The food coloring would still be equally spread across the water, but the lake would not even change color because each water molecule holds a very small amount of food coloring. What I am saying here is that the scale of the host (anything that holds the water) determines how much of the solute is spread around each water molecule. The same goes for osmosis. If the cell or the water around it is bigger, it affects which direction the water goes.
No comments:
Post a Comment