Osmosis! Rap Science Music Video

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• published: 27 Jan 2013
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On iTunes at https://itunes.apple.com/us/artist/glenn-wolkenfeld/id555040717 More Osmosis learning at http://www.sciencemusicvideos.com/osmosis-tutorials-flashcards-and-quizzes-menu/ Buy the video at http://www.teacherspayteachers.com/Store/Glenn-Wolkenfeld-1 Get curriculum at http://www.sciencemusicvideos.com LYRICS I put this yummy gummy through a science experiment, That models what happens to a cell in an environment That's more watery than the cell is inside, And what I saw, came as no surprise, My gummy bear expanded -- quintupled in weight, My gummy expanded, an increase so great, So listen up as Mr. W explains this! It's all about osmosis! Osmosis is the diffusion of water, Across a membrane or a water-permeable border. Diffusing like all molecules in fluid situations, From higher to lower concentration. CHORUS OSMOSIS! H20 diffusing OSMOSIS! See that water oozing Hypotonic to hypertonic flow OSMOSIS! Let's go! Let's talk about our gummy, in osmotic terms, Hypotonic, hypertonic, isotonic are the words You can use to discuss water's watery diffusion, Learn 'em well, to avoid confusion. Hypotonic means higher water concentration And relatively lower solute concentration, Hypertonic is the opposite --percent of water's less, With more solute dissolved inside, as you might guess So let's take these terms and apply them to our gummy bear, I'm looking at the package, and seeing what it says here, Each bear is mostly sugar with some other stuff mixed in, And holding it together is the protein gelatin So when you put a gummy in a cup of H2O It's readily apparent that the gummy is so Hypertonic to the water that it's in, and the water's hypotonic to our little gummy friend, And so through osmosis the water will diffuse, Into the gummy which soon will look so huge, The mass it gains is water which will infiltrate the gummy, Which one day later, is looking pretty funny CHORUS Next I took this freshwater plant, name is elodea It lives in lake and ponds never in the salty sea, In fresh water elodea cells are full and firm, It's all about osmosis as we're gonna confirm. See the cells are hypertonic to their watery exterior, So water will diffuse into the cell's interior, Expanding the membrane, pushing it against the wall, In fact you can't see the membrane at all, But add some salty water so the outside's hypertonic, And water leaves the hypotonic cells, it's so osmotic! Membrane leaves the wall, the cells' insides are scrunched. With the chloroplasts all stuck together in a bunch That's why at the grocery they always have that mister The water on the veggies helps to keep them crisper, Those droplets on the veggies are a hypotonic brew, osmosis moves the water in, the veggies look brand new. Dried fruit and beef jerky preservation is osmotic Their low water content makes the dry food hypertonic So any germs or molds that fall upon them lose their water And die and don't contaminate the dried food in the larder CHORUS Animal cells, in situation hypertonic Lose their water, shrink and shrivel look so sick But an animal cell in hypotonic abode Gains water and expands, eventually explodes 'Cause animals cells lack a wall, of course So nothing pushes back at the osmotic force, Water flows from hypotonic to the hypertonic cell, Which bursts cause the membrane can't stop the swell, If you want to keep a frog heart outside a body beating, An isotonic fluid, is what you'll be needing, Water concentration's same on each side of the cell, No gain or loss of water, the cell's feel so swell And this paramecium which lives in ponds and lakes Constantly fights osmotic water uptake, The contractile vacuole's a pumping adaptation To deal with this osmotic situation VIDEO CREDITS: Osmosis Animation by Matt Kinahan http://www.youtube.com/MRLifeANDstuff Elodea with chloroplast and Paramecium by Microscope Italy http://www.youtube.com/microscopitaly Elodea Plasmolysis by biopathe vidéo http://www.biopathe.fr/ Leukocyte burst in water by Cellbiophysics https://www.youtube.com/CellBiophysics Beating frog heart by Michael H. Weinberg http://www.youtube.com/michaelhweinberg