How is dust formed?
Why is there always dust around us?
Some dust can only be seen by visible sunlight, and not by our own eyes. Why?
2007-02-04 23:43:05 · 7 answers · asked by Sachu 2 in Science & Mathematics ➔ Earth Sciences & Geology
House dust appears to come from nowhere. It seems you no more than clean a surface and within hours or even minutes, dust reappears. What is this stuff? Where does it come from?
Approximately 20% of the dust in an average home will consist of pollen, mold spores, insect parts, microscopic urine and fecal particles from pet accidents, dust mites, mite excrement, and fibers from clothing, carpet, paper towels, tissues and toilet paper. When inhaled, these dust particles can trigger allergies and asthma, and cause a long list of ill health affects.
The remaining 80% of house dust is not much better. It is dead skin cells (dander) from humans and pets. Pound for pound, most of this dander comes from humans. Each person in your home will create about 40,000 particles per second. We shed billions of these particles everyday and there is no way to stop it. These dead skin particles become the primary food source for dust mites and mold which in turn further denigrates our indoor air quality.
2007-02-04 23:49:41 · answer #1 · answered by Anonymous · 3⤊ 0⤋
dust is formed by the wind picking up stuff that is very light and blowing it all around. this can be raised up in to the upper atmosphere and then fall as the weather conditions permit.
the dust that you can see is like house dust in the sunlight , the only reason you can see it is because the sunlight is bouncing off it and lighting it up so that you can see it.
2007-02-05 01:06:50 · answer #2 · answered by strange_bike 2 · 0⤊ 0⤋
dust is formed by tiny particles. you can see dust better in the sun because the tiny particles reflect the light. did you know that a major source of dust in the home is human skin?
2007-02-04 23:54:05 · answer #3 · answered by Westport 2 · 1⤊ 0⤋
By this I suppose you mean house dust which is mostly skin cells. Dust it the big outdoors is mostly very finely divided rock which is so small we cannot usually see it unless it is strongly illuminated by , for example. sunlight
2007-02-04 23:49:20 · answer #4 · answered by Anonymous · 1⤊ 0⤋
I understand that the majority of (house) dust is actually dead skin cells, and therefore is formed by falling from our bodies!
2007-02-05 00:15:04 · answer #5 · answered by ♥ Divine ♥ 6 · 0⤊ 0⤋
house dust is mostly human skin particles or dog skin and fur particles in my household (grin)
airborne dust is best viewed in sunlight but still exists even in the dark!!
it's the thought of housemites that bothers me and their faeces that further add to dust and allergic response
2007-02-04 23:53:06 · answer #6 · answered by majic 2 · 1⤊ 0⤋
Dead skin cells apparently.
2007-02-04 23:46:32 · answer #7 · answered by garlicjnr2001 3 · 3⤊ 2⤋