Nekuda kwekuomarara kwakaoma, plastiki inova kusvibiswa kukuru.Kana uchida kuti purasitiki ive kuparara kwechisikigo munyika yechisikigo, inoda kutenderedza 200 ~ 1000 makore.Asi chimwe chinhu chakasimba kupfuura epurasitiki, uye chiripo kwenguva refu, igirazi.
Anenge makore 4000 apfuura, munhu aigona kugadzira girazi.Uye makore anosvika 3000 apfuura, maEjipita ekare ane hunyanzvi mukugadzira girazi.Iye zvino zvigadzirwa zvakawanda zvegirazi munguva dzakasiyana zvinowanikwa nearcheologist, uye zvakachengetedzwa zvakanaka, izvi zvakaratidza kuti mazana emakore haana simba pagirazi.Kana yakareba, chii chinoguma?
Chinhu chikuru chegirazi ndeye silica uye mamwe maokisi, iyo isiri-crystal yakasimba ine chimiro chisina kujairika.
Kazhinji, kurongeka kwemamolecular emvura uye gasi hakuna kurongeka, uye pakusimba, kurongeka.girazi rakasimba, asi kurongeka kwemamorekuru kwakafanana nemvura uye gasi.Sei?Muchokwadi, kurongeka kwegirazi kweatomu hakuna kurongeka, asi kana ukacherechedza atomu imwe neimwe, iatomu resilicon rimwechete rinobatana nemaatomu mana eokisijeni.Iyi yakakosha kuronga inonzi "short range order".Ichi ndicho chikonzero girazi rakaoma asi risina kusimba.
Kurongeka kwakakosha uku kunoita girazi nekuomarara kwakanyanya, panguva imwe chete, kemikari yegirazi yakanyatsogadzikana, inenge isina kemikari inopindirana pakati pegirazi nezvimwe zvinhu.Saka zvakaoma kuti girazi rive necorrod kune zvakasikwa.
Girazi guru raizotsemuka kuita zvidimbu zvidiki zvichirwiswa, nekumwe kurwiswa, zvidimbu zvidiki zvaizova zvidiki, zvidiki pane jecha.Asi ichiri girazi, girazi rayo hunhu haushanduke.
Saka girazi rinogona kuvapo munyika yechisikigo kweanopfuura zviuru zvemakore.
Nguva yekutumira: Feb-15-2022