What does dust consist of and where does it come from? I mean the kind of dust you get in your room if you do not clean it for some time. I guess from the air, but than dust should be a gas and not a solid thing.

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anonymous · Answer

Could be your skin, air particles like pollen (i dont know if this is the correct name. I mean that thing that bees carry on)

anonymous · Answer

dust can be a lot of things

anonymous · Answer

Check out "The Secret Life of Dust" by Hannah Holmes.  Easygoing read, lots of info.  2001 book.  Still current; some of that 2001 dust is still around nowadays!

Incidentally, I've read that the ground level in Rome rises about 1 foot per century.  So a building from Roman times is now 20 ft underground, unless it is of archaeological interest and is continually "swept clear".  Dust does tend to accumulate!

anonymous · Answer

Dust is a solid, but due to its dimensions it can be suspended in the air, in a similar way that a cloud is a suspension of small droplets of water in the air.

The dust in your house is made of many things, and consists of out door soil and grit, pollen, soot, human hair and skin cells (as well as animal hair and skin cells), as well as bug and dust mite excrement.

anonymous · Answer

If the dust-stuff is normally in the air - in small amounts - why does it gather at some place to "grow" into one bigger thing?

anonymous · Answer

I don't know offhand why dust clumps.  Wonder if you could model it as a gas, which is condensing?  Some popular reading about interstellar medium (ISM) might offer ideas.

zion · Answer

Tom... ask why people tend to gather in a certain place to be a bigger community.

anonymous · Answer

But dust is "dead" - it makes sense that people gather but particles?

anonymous · Answer

Dust is spread out evenly because of gravity, although it has negligible mass it will still be drawn to the earth. Dust is deposited evenly but places that are trafficked more frequently will see less dust, because the dust is kicked up and then redeposited. So if you think about it the places that aren't trafficked will tend to "gather" a lot of dust because nothing is displacing the dust.

anonymous · Answer

dust is nothing but a solid particles whose size ranges form few hundreds of nanometers to few hundreds of micrometers.they are everywhere and every time around us.they can be light particles of sand,etc.,