Yadda dinosaur suka zama batattu

Yadda dinosaur suka zama batattu Abu ne da mutane da yawa da masana kimiyya ke tambayar kansu. Duk da haka, ba a san ainihin ba, amma akwai ra'ayoyi da yawa waɗanda masana kimiyya suka fi shafa. Irin waɗannan ra'ayoyin suna dogara ne akan shaidar da za ta iya tabbatar da ƙimar su. Amma akwai tambayoyi da yawa da har yanzu ba a warware su kan wannan batu ba.

A cikin wannan labarin, za mu gaya muku menene ainihin ka'idodin game da yadda dinosaur suka zama batattu.

Yadda dinosaur suka zama batattu

Dinosaurs sun kasance mafi girma da ke da alaƙa da dabbobi masu rarrafe a duniya. Ana la'akari da su nau'in nau'in dabbobi masu rarrafe masu ɗumi-ɗumi kafin tarihi, masu alaƙa amma sun bambanta da rayayyun halittu har ma da tsuntsaye. Sun rayu kusan shekaru miliyan 160, a lokacin Mesozoic, ya kasu kashi uku lokaci: Triassic, Jurassic da Cretaceous. Sun bace daga saman duniya tuntuni.

Yaushe kuma ta yaya dinosaur suka bace? Wannan ita ce ɗaya daga cikin mafi yawan tambayoyin da har yanzu ke kewaye da waɗannan dabbobin da suka gabata. Yayin da kimiyya ta tsara kwanan wata da dalilin hakan, a yau, albarkacin ci gaban kimiyya, an sami ƙarin cikakkun bayanai da bincike, an gabatar da ƙarin ra'ayoyin, kuma a wasu lokuta, kwanan wata na iya canzawa.

An yi imanin cewa ranar bacewar dinosaurs ta kasance kimanin shekaru miliyan 65 da suka wuce. Amma, menene mafi yarda da ka'idar bacewar dinosaur a cikin al'ummar kimiyya? Shekaru da yawa, an ƙaddara cewa tasirin meteorites ko asteroids a duniya yana yiwuwa ya shafe waɗannan ƙattai masu dadewa. Duk da haka, kamar yadda muka ambata, akwai wasu dalilai masu yiwuwa na wannan, kuma a yau, waɗannan su ne mafi kusantar ra'ayoyin:

• meteorite ko asteroid
• Aikin Volcanic
• Canjin yanayi

Ka'idar meteorite a cikin bacewar dinosaurs

Tsakanin ƙarshen 1970s zuwa farkon 1980s, wani meteorite na diamita na kilomita 12 ko asteroid wanda ya buge Duniya, musamman a yankin Yucatan Peninsula na Mexico, an yi la'akari da shi don haifar da halakar dinosaur.

An gano wani nau'i mai arziƙin ƙasa ko tsari wanda ya mamaye duniya baki ɗaya kuma ya samo asali ne tun lokacin da bacewar jama'a. Wannan sinadari ba a saba samunsa a saman duniya ba, amma yana cikin magma a cikin duniya, da kuma a cikin tsofaffin halittu da meteorites da ke kwance a karkashin kasa. Saboda sinadarin yana da guba sosai da kuma rediyo, masana kimiyya sun yi imanin cewa bayan wani babban meteorite ko asteroid mai arziki a cikin simintin ya buge kuma yana samar da adadi mai yawa na sinadari daga cikin yadudduka na duniya, abu yana yaduwa cikin duniyaa, ƙarshen rayuwa a duniya. Yawancin halittu da dinosaur sun zama batattu, amma wannan ba shine kawai dalilin ba, sarkar dauki ta faru.

Babban dutsen Chicxulub, An gano shi a yankin Yucatan na kasar Mexico, kuma ya kai kimanin shekaru miliyan 65 da suka gabata, don haka ana kyautata zaton wurin ne aka gano manyan asteroids wadanda suka fadada harsashin iridium. Daga karshe ya kai ga wannan babban bala'i.

Don haka yawan bacewar dinosaurs ya faru ne sakamakon wani meteor da ya buge Mexico. Duk da haka, ba tasirin da kanta ya kawo ƙarshen rayuwar mutane da yawa ba, a'a yana da tsarin sarkar da ya ƙare mafi yawan rayuwa a duniya.

Abubuwan da suka kai ga mutuwar Dinosaur sun kasance kamar haka.

• Wannan tasirin ne ya kawar da dinosaur a yankin.
• Wani fashewa ko girgizar girgiza wanda ke haifar da babban tasiri da al'amari a kan babban yanki na ƙasa, kamar babbar tsunami.
• Guba da radioactivity na iridium da sauran abubuwan da aka kora daga saman saman duniya a sakamakon fitar da ruwa daga tasirin meteorite.
• An ƙididdige yawan hauhawar zafin jiki da yawa fiye da na Rana. kuma har ma ta haddasa gobara mai nisan kilomita dubunnan daga inda abin ya faru.
• Wani kauri da fadi na ma'adanai da sauran abubuwan da ke tasowa a sararin sama sakamakon tasirin jiragen wuta da iskar gas. Mafi yawa, sararin sama yana rufe da gypsum, wani abu mai dauke da sulfate wanda ya rufe yawancin tsibirin Yucatan a lokacin. Gypsum yana jujjuyawa kuma ya zama sulfates waɗanda ke tashi zuwa sararin samaniya da yawa, yana hana hasken rana isa saman duniya. Photosynthesis yana tsayawa (a kasa da cikin teku) saboda toshe hasken rana, gidajen yanar gizo na abinci sun lalace, da kyar dabbobi ke iya gani, yana da wahala a sami ko da ɗan abinci bayan ƴan kwanaki. Faduwa kwatsam (kimanin 10ºC), yana sa yawancin Duniya daskare. Don haka, saboda wani hali ko wani abu, halittun lokacin sun kasance sannu a hankali suna mutuwa daga yawancin rayuwar da suka rage a duniya. A tsawon lokaci, wannan Layer ya narke kuma wani bangare ya faɗi ƙasa, yana ba da isasshen hasken rana don dawowa rayuwa don tada ƴan tsira.

Ka'idar volcanoes ita ce dalilin bacewar dinosaurs

Wata ka'idar da ta fi goyon bayan binciken kimiyya da aka gudanar ya zuwa yanzu ita ce, dutsen mai aman wuta ya shafe dinosaur. Akwai shaida cewa, a ranar da wannan bacewar, an yi wani gagarumin aikin dutse mai aman wuta da ya ci gaba da dadewa ba tare da tsangwama ba, musamman a bangaren Indiya. A hakika, Lava daga wadannan aman wuta da aman wuta ya mamaye fiye da murabba'in kilomita miliyan 2,6 na Indiya.

An yi imanin cewa irin wannan bala'i zai kashe dukan dabbobi a wannan yanki na duniya. Bugu da ƙari, saboda magma daga cikin ƙasa da lava na volcanic mai arziki a iridium, tare da toka mai aman wuta da iskar gas mai guba da ke fitowa daga ci gaba da fashewa, dinosaur sun bace. Wahalhalun da hasken rana ke fuskanta zuwa saman duniya, da karuwar iskar gas da gubar iskar (wanda ke rage iskar oxygen) sune cikakkiyar haduwar da za ta hana nau'ikan halittu da yawa tsira a wannan zamani.

Ka'idar canjin yanayi a cikin halakar dinosaur

A ƙarshe, ka'idar ƙarshe da masana kimiyya suka yarda game da dalilin da yasa dinosaur suka ɓace shine canjin yanayi a cikin Cretaceous. Akwai isassun shaidun burbushin halittu a cikin yanayin ƙasa da kuma a cikin burbushin dabbobi da tsirrai cewa jerin bala'o'i, kamar su. girgizar ƙasa, tides da alamun faɗuwar zafin jiki, sun faru ne a lokacin matakin ƙarshe na zamanin dinosaur, wanda ya haifar da matsanancin canjin yanayi.

Bugu da kari, matakin ruwan duniya ya ragu matuka saboda tsananin zafin da ake samu. Wani bangare kuma shi ne manyan sauye-sauyen yanayi a wancan lokacin, kuma wadannan manyan dabbobi ba za su iya daidaitawa cikin lokaci ba.

Ina fatan cewa tare da wannan bayanin zaku iya ƙarin koyo game da yadda dinosaur suka zama batattu.