Sidee jir ah dhulka?

The maskaxda saynisyahano badan oo dadka caadiga ah ayaa muddo dheer ku kiciyeen su'aasha ah: "Waa maxay da'da dhulka"? Currently, habka ugu caansan si loo ogaado da'da fossils waa shukaansi radiocarbon. Laakiin xitaa habka ugu adag ayaa qalad weyn. Recently, saynisyahano ogaaday in heerka of suuska shucaaca waxaa saamayn ku yeelan arrimo badan, sidaa darteed waxay qaadan sida joogta ah a waa wax aan macquul aheyn. Sidoo kale, waxaa jira aragtiyo kale oo badan oo loo ogol yahay, laakiin waa in aad u qiimeeyaan oo kaliya in lala xaqiiqooyinka kale ee la xidhiidha aragtida ah abuuritaanka iyo horumar.

The xoog magnetic field

Kormeerka ayaa muujisay in ka badan 1,400 oo sano ee la soo dhaafay heerka xoogga duurka magnetic of dhulkeenna laba jeer dhacay. waxaad samayn kartaa xisaab fudud ku saleysan xogta sida, taas oo muujinaysa in da'da Dhulka ma aha in ka badan 10 kun. sano.

"Pierce" layers dhulka. Dhuxul, Peat iyo saliidda

Inta badan qeybaha dhoobo ah ku dul a dogob vertical takhalusin dhirta, iyo sidoo kale macdan kale ku turunturoon karo, "cabaar" layers kala duwan ee dhulka. Dhab ahaantii Tani waxay soo jeedinaysaa in daadkii yimid oo maanshaynay geedaha rhizome hoos.

Waxaa xusid mudan in inta badan oo ka mid ah khayraadka macdanta ee hadda jira waa sheyga daadka. Sidaas dhuxusha, saliid iyo Peat soo jeedin musiibo weyn. Ka dibna, iyo qaar kaloo badan - waa organic, kaas oo ahaa in hal meel oo dulfuulan sarkhaansan yihiin heerkulka iyo cadaadiska. Way adag tahay in la qiyaaso sida la abuuray sannado badan. Saas ma aha ee, waxa laga yaabaa in daadkii weyn oo ah in uu keeno geedaha, cawska iyo noolaha kale ee ku nool isku uruursadaan barta qaar ka mid ah, halkaas oo ay Dabayl Dhagaxyo culus oo u riixay jirka weyn oo biyo ah.

washout

Qubarada badankooda ayaa aaminsan in haddii da'da Earth ee malaayiin ah, dusha dhulka ee mar hore qabsadaan heerka badda sida Dhulka sarkhaansan yihiin roobka si tartiib tartiib ah maydhay badda, waxaas oo kale la xirrira sida Schalke a. Haddaba maxaad in badaha waa% cusbo kaliya 3.6, maxaa yeelay, malaayiin sano roobabka wax kasta in la dhaqo off galay meydadka biyaha?

Cir horeysay pride US ahaayeen dhab ah ka walwalsan in ay lumaan karaan ciidda ku meteoric, tan iyo markii sida ay aragti guud ee horumar ah ee Moon la aasaasay laba ama saddex bilyan oo sano ka hor, mar la Dhulka. malo Tani waxay keentay in male dhammaataan macquul ah waa in on Earth satellite ah ayaa helay tiro aad u badan oo ah boodhka meel. Laakiin cir yimid helay lakabka ah mid aad u yar oo ah ciidda. Xisaabaha ayaa muujiyay, in da'da dayaxuna ma dhaafi karo sumadda 10 kun. Years.

content Low of helium

Waxaa caddeeyeen in geeddi-socodka ah ee bololka ah nuclei uranium helay of helium iyo hogaanka. Inta ay helium timaada hawada, - 300 kun oo tan sannadkii .. Si aad u taariikhda, waxay caddeeyeen in jawiga waxaa ka buuxa wax yar ka badan 3 bln. Ton oo helium, taas oo muujinaysaa in da'da Earth waa lagama yaabo in ka badan bar ka mid ah 10 kun. Years.

Dinosaurs - markhaatiyaal wanaagsan

Lafaha fossils badan oo xayawaan qiroweyn aan weli soo jeestay inay ku dhagxiyaan. Sababta oo ah oo dhumucdiisuna waxay gaar ah, uma badna in ay dhawr kun oo sano si ay u dhamaystiraan mineralization. Mararka qaarkood lafaha la kulmay haraadiga unug jilicsan iyo unugyada dhiigga cas xataa. Sidoo kale, waxaa jira fara badan images of noocyada kala duwan ee dinosaurs, xardhay ku cobbles iyo dhagaxyadii, taasoo muujinaysa jiritaanka dadka wakhtigaas. Maxaad saynisyahano aadan tegin ka aragti in dinosaurs malaayiinta sannadood ka hor, oo ay sii wadaan isaga oo sheegaya in dhulka uu leeyahay in ka badan hal bilyan oo sano?

Sida caddayn, waxaan sidoo kale xusuusan badan oo sheekooyinka iyo halyeeyadoodii hore, kaas oo ku lug dawacooyinka. Inta badan, in sida dawacooyin ka mid ah ayaa si tartiib tartiib ah halis nooc oo dinosaurs.

Dabcan, waxaa jira xujooyin badan oo kala duwan ee xaqiiqda ah in da'da Earth meeraha ma noqon karo balaayiin sano jir. Intaas waxaa sii dheer, inta badan oo ka mid ah xaqiiqooyinka cilmi ahaan la xaqiijiyey oo ku saabsan dhigma qoraalka soo bandhigay in Kitaabka Quduuska ah. Laakiin markan cilmi of arrintan weli ma uusan awoodin in ay bixiyaan jawaab ka badan ama ka yar la taaban karo su'aashan, tan iyo ma technology casriga ah ama aragtiyo kala duwan oo aadan bixin fursad noocaas ah.