![Cov av nplaum los ntawm qhov twg thiab nws tau ua li cas? Cov av nplaum los ntawm qhov twg thiab nws tau ua li cas?](https://i.answers-medical.com/preview/medical-health/14145100-where-does-chalk-come-from-and-how-is-it-made-j.webp)
Video: Cov av nplaum los ntawm qhov twg thiab nws tau ua li cas?
![Video: Cov av nplaum los ntawm qhov twg thiab nws tau ua li cas? Video: Cov av nplaum los ntawm qhov twg thiab nws tau ua li cas?](https://i.ytimg.com/vi/8A88zIHfDR0/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Chalk los los ntawm limestone. Feem ntau ntawm cov cov av nplaum koj tuaj yeem tau txais hnub no yog ua yuav luag 50 txog 100 lab xyoo dhau los. Nws yog chemically ua ntawm calcium carbonate. Cov pob zeb uas muaj ntxeem tau tob tob hauv qab hiav txwv qhov me me ncig cov pob zeb calcite hu ua coccoliths sib sau toform limestone.
Tsis tas li ntawd, cov chalk ua li cas?
Lub ntsiab tivthaiv ntawm cov av nplaum yog calcium carbonate (CaCO 3), ib daim ntawv ntawm limestone. Limestone depositsdevelop li coccoliths (feeb calcareous daim hlau tsim los ntawm decomposition ntawm plankton skeletons) sib sau, formingsedimentary txheej. Chalk thiab lub cev qhuav dej gypsum yog li muaj cov keeb kwm zoo sib xws thiab cov khoom.
Tsis tas li, Puas yog Chalk ua los ntawm cov pob txha? Koj Chalk Tej zaum Ua Los ntawmMillion-xyoo-laus Plankton Skeletons. Hom ntawm cov av nplaum pom hauv daim duab, coj los ntawm tus kws tshawb fawb Jeremy Young, yog ua ntawm calcium carbonate. Cov chalk txheej ntawm cov pob zeb limestone no tsim los ntawm tseem tshuav ntawm coccolithophores, ib hom ntawm phytoplankton hauv nkoj nrog cov nyom exoskeleton.
Yog li ntawd, qhov twg chalk pom nyob rau hauv lub ntiaj teb no?
Chalk tau paub dav ntawm cov neeg ntawm WesternEurope thiab ob peb lwm qhov ntawm ntiaj teb vim nws yog pob zeb dawb dawb uas tuaj yeem tsim cov pob zeb ntsug raws ntug dej hiav txwv.
Puas yog chalk yog cov khoom siv ntuj tsim?
Lawm, chalk los ntawm av uas nws pom pom tias muaj ntxeem tau (tuaj yeem tuav dej tau) cov pob zeb sedimentary. Nws yog qhov hloov pauv ntawm limestone thiab yog tsim los ntawm cov ntxhia calcite. Chalk tau muaj kev sib cav rau ntau pua xyoo thiab nyob rau lub sijhawm qub tau sib cav rau kev tsim tsev cov ntaub ntawv thiab tau siv rau ntawm thaj chaw.
Pom zoo:
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