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Fusion in the stars

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Found at http://rmpbs.pbslearningmedia.org/resource/ess05.sci.ess.eiu.fusion/the-elements-forged-in-stars/ on 9/14/16

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all the atoms in the universe heavier than hydrogen and helium by stars  arms are really interesting they don't just sit there they know that because they last so much longer than we do we think they're their permanent stars are the ultimate outcome it's they they turn light elements into heavier since they get the energy that they need to blow that way  star begins its life made out of hydrogen and helium mostly about 70% hydrogen 28% helium in the case of the Sun  in a star's core the temperature and pressure is so high that hydrogen atoms fuse together to make helium hydrogen Fusion releases prodigious amounts of energy life of a star what star fusing hydrogen to make helium eventually though the star runs out of hydrogen and begins to fuse it stocks of helium get heavier elements and so the way it works and it always works this way is that it contrax and it gets hotter and if it can find something new to burn whether it's the sink or cold or whatever it'll burn it is taking 3 at a time to make carbon you can add one more helium to that carbon and make element number 8 oxygen that's a tremendous step forward you get carbon and nitrogen and oxygen made in Stars this is great because on the board we already have the principal Elements of Life Organic Chemistry is the chemistry of carbon carbon fuses next and still heavier elements begin to form sulfur chlorine potassium calcium starting to burn at three and a half billion degrees stupendous temperature  it makes it a denium Vanadium chromium Cobalt nickel and iron man is really the end of the road it's it's sir the nuclear battle with you just cannot squeeze anymore it's the end of the game a star that has relied on Fusion has come to the point where it has nothing more to spend suddenly caught in a disaster there's radiation going out from the outside but deep in the inside there's no more fuel iron can't fuel Stellar furnace and so when a star builds up too much iron it dies slowly in and faster and faster and that sends a very sharp wave back out through the star what was falling down is going out the whole thing blowing up and you made a supernova the Supernova explosion too can be as bright as 4 billion stars like the sun the stupendous explode such outrageous energies overcome the iron barrier cooking Adams into all the rest of the elements on the periodic table so starting down here you can go Capri Randy Marion. S&f element

Uploaded by Sara Ferber Kliewer.

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Fusion in the stars

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