I've seen this several times on Tumblr, but this is my answer.
I just sort of thought that the lead from the writing on the paper gets stuck on the eraser. I dunno.
That depends on what you mean... If you are referring to 'erasing' with a rubber/eraser, then, no, not destroyed... The carbon simply gets added to the lithosphere... The first law of Thermodynamics is just that: 'Matter cannot be created, nor destroyed - only transferred or transformed'... Henceforth, the carbon from pencil lead is simply transferred to the rubber, or flicked into the lithosphere, where eventually it will become part of the carbon cycle once again.
If you are referring to on a computer, then you don't understand anything about thermodynamics.
If you mean like erasing history on your computer and on your phone, I heard from my guidance teacher that it doesn't actually get erased. It gets sent to some place. I can't remember.
