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Greg Foot: Hey guys, so this is the fourth explanation video for the 12 Explosions of
Christmas. I'm Greg - Mike Sansom: and I'm Mike!
Greg: and here are our four flaming puds, not yet flaming! Now they may look like they've
got special toppings on them from pistachio to chocolate to icing sugar. But these are
kinda inedible. Mike: Yep they're completely inedible.
Greg: What have they got on them? Mike: Well they've got different metal salts
on them with something that burns. Hopefully we're going to produce a different colour
on each pud. This one we've got strontium --
Greg: Yeah strontium, barium that's the particularly nasty one, copper, and sodium. This is all
about giving energy to those metal ions, those metal atoms, and exciting the electrons inside
them, and then those electrons drop back down again to their original energy level, and
they spit out a different, essentially, light photon. So you get different colours from
the different metal salts. Right? Mike: Shall we try it?
Greg: Let's do it!