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DESCRIPTIONAwesome Osmosis. Really smelly demonstration…. Put a few drops of vanilla in a balloon Shake the balloon, then wait about 30 seconds Smell the outside of the balloon. What’s going on?. - PowerPoint PPT Presentation
Awesome Osmosis Really smelly demonstration..Put a few drops of vanilla in a balloon
Shake the balloon, then wait about 30 seconds
Smell the outside of the balloon
Whats going on?EVIDENCEINFERENCEA drop of vanilla was added to the inside of a balloon and soon the aroma could be detected on the outside of the balloon.Remember Diffusion?What is the definition of diffusion?The movement of particlesFrom an area of high concentration
To an area of low concentrationOsmosis is a special kind of diffusionWATER molecules move across a membrane
The movement is still from an area of high water concentration to an area of low water concentration
Guess which way the water will move75% water molecules25% water moleculesCorrect-a-mundo!50% Water Molecules50% Water MoleculesMeanwhile, back at the smelly balloon.EVIDENCEINFERENCEA drop of vanilla was added to the inside of a balloon and soon the aroma could be detected on the outside of the balloon.Infer why the balloon smellsOsmosis made the smell particles move through the balloon membrane because they crashed into the inside of the balloon and accidentally fit through the tiny holes.Notice that only the WATER molecules moveSalt doesnt crossProteins dont cross
Shaker cube demo Start with all of the red and white beads on the same side.
Shake the cube a bit.OBSERVE:Which beads, or particles, fit through the holes?
INFER:Why wont the red beads move?
APPLY: Which color beads would represent water molecules doing osmosis? What would represent the cell membrane?When talking about cells, osmosis means water molecules crossing the Cell MembranePicture this.You and your friend are alone in a small boat in the middle of the oceanThere is no fresh drinking waterYour friend decides to just drink ocean waterYou decide to just wait for some rainfall
Osmosis says..85% water in the cells lining the stomach75% water in ocean waterWhich way will the water molecules move?
Your friend loses & isEven more dehydrated !Picture thisYou are snowboarding at Powder Mountain.There are 20 centimeters of fresh, sparkling powder under you.The day is sunny, but only -10o C thats cold!
You forgot your chapstick
15% water in the air85% water in your lip cells
Which way will the water molecules move?
Can you say chapped lips?OsmosisThe movement of WATER molecules across a cell membrane.Quick Quiz Question 1
What will happen when a cell that is 75% water is placed into a beaker of salt water that is 65% water?The cell will shrivel because water will move out of the cellThe cell will shrivel because salt will move out of the cellThe cell will plump because water will move into the cellThe cell will plump because salt will move into the cellQuick Quiz Question 2
What is the difference between osmosis and diffusion?In diffusion, particles move from high concentration to low concentration. In osmosis, particles move from low to high.In osmosis, salt particles move across a membrane, making things swell. In diffusion, only water particles move.Osmosis is a special type of diffusion where water moves across a membrane.