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Praf Cuprins Praful atmosferic | Componente | Curiozități | Legături externe | Meniu de navigarePrafInvincibilul general Nor de praf4057011-31064764100574763

Materie


particulescoarței terestrecorpuri solideprocese biologicecompușilor mineralipielebacteriianimaleacarieni










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Praf




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Piele umană


Praful este materialul format din particule solide foarte fine, provenite din fărâmițarea naturală a scoarței terestre, a unor corpuri solide, din unele procese biologice ale viețuitoarelor. Praful se găsește peste tot.




Cuprins





  • 1 Praful atmosferic


  • 2 Componente


  • 3 Curiozități


  • 4 Legături externe




Praful atmosferic |


Praful provine din zone aride, adică din regiuni unde vânturile bat cu viteze mari și au puterea de a toci și roade majoritatea compușilor minerali.



Componente |


Praful conține mai multe elemente, printre care resturi de piele umană, bacterii și resturi de animale moarte.



Curiozități |


Cei alergici la praf sunt alergici și la acarieni.



Legături externe |



Commons


Wikimedia Commons conține materiale multimedia legate de Praf



  • Invincibilul general Nor de praf, 22 noiembrie 2006, Gabriel Tudor, Revista Magazin








Adus de la https://ro.wikipedia.org/w/index.php?title=Praf&oldid=9761127










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