Why Does The Earth Have Layers?

submitted by MrsBeebs on 02/02/17 1

…or why we live on an onion made of magma Subscribe to It's Okay To Be Smart: bit.ly/iotbs_sub ↓ More info and sources below ↓ Follow on Twitter: twitter.com/jtotheizzoe Follow on Tumblr: www.itsokaytobesmart.com Follow on Instagram: instagram.com/jtotheizzoe Thanks to Miles Traer and Mike Osborne for geophysics help on this one! Why does Earth have a liquid core, and how do we know? scienceblogs.com/startswithabang/2011/09/28/why-does-the-earth-have-a-liqu/ How many pennies would you have to stack to melt the one on the bottom? www.reddit.com/r/askscience/comments/2g8jj9/how_many_pennies_need_to_be_stacked_before_the/ Why are the inner planets rocky and the outer ones are gas giants? www.quora.com/Why-are-the-inner-planets-rocky-and-the-middle-planets-large-gas-giants ----------------- Have an idea for an episode or an amazing science question you want answered? Leave a comment below! Follow me on Twitter: @jtotheizzoe Email me: itsokaytobesmart AT gmail DOT com Facebook: www.facebook.com/itsokaytobesmart Google+ plus.google.com/+itsokaytobesmart For more awesome science, check out: www.itsokaytobesmart.com Produced by PBS Digital Studios: www.youtube.com/user/pbsdigitalstudios Joe Hanson - Host and writer Joe Nicolosi - Director Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer Katie Graham - Director of Photography Andrew Matthews - Editing/Motion Graphics John Knudsen - Gaffer Dalton Allen - Post-production Intern Theme music: "Ouroboros" by Kevin MacLeod Stock images via Shutterstock ----------------- Last week's video: Why do clouds stay up? www.youtube.com/watch?v=DjByja9ejTQ More videos: The Physics of Space Battles www.youtube.com/watch?v=ZFOuxAx-dkc Why Did We Blow on NES Games? www.youtube.com/watch?v=4Gf9mtXnJfM The Science of Game of Thrones - www.youtube.com/watch?v=Utu-LpJn3Is The Far Future of the Universe - www.youtube.com/watch?v=Jl9DwNOonOA There Was No First Human - www.youtube.com/watch?v=xdWLhXi24Mo How The Elements Got Their Names - www.youtube.com/watch?v=mtg9p6A6xnY

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