by 
PokerPaul
ANSWERS: 7
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Primarily, dead skin cells.
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Actually, there are three main components of dust: first, dead skin cells, second, the dried feces and dessicated corpses of dust mites (lovely thought, eh? When people develop a house-dust allergy, this is usually the component they are reacting to), and the last component by volume is tiny fibers shed by clothing -- cotton is bad for this, and jeans are the worst. This is for ordinary house dust. (Incidentally, dust mites are not generally visible, except with a microscope; they are 200-300 microns long, they eat dead skin cells and live in bedding, carpets and soft furnishings. Always. Trust me on this, anything a year old or more has a good population of them.) In the case of a new basement, on the other hand, the primary component of dust is likely to be the obvious: concrete. Elsewhere in a brand-new house plaster and plasterboard both "shed" copiously over the first few weeks. And outdoor dust is fine particles of soil and stone dust (composition dependent on location and prevailing winds), with a hefty component of pollen and other plant material. So it does depend on where you are.
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Jewels Vern Human hair is 60 to 120 microns thick, so your mites are easily visible with 10x magnification.
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Atoms, same as most everything else.
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not atoms... skin is made up of cells atoms are the components of elements
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I am very sorry to say that dust is not made of mainly of dead skin... (if so then your bedroom would contain the most dust) Dust is mostly made up of the small particles of dirt, wood, fibres etc. The normal stuff you would find in your local enviroment. Dust is dust because the particles are small enough to be carried in the air.
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Smaller dust.
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Seriously...does it matter. it's all nasty. just clean the shit! :-D
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