Iplanethi enguMhlaba yaziwa ngamanye amagama afana neplanethi eluhlaza okwesibhakabhaka. Kukuphela kwesijikelezi-langa esaziwa kwindalo iphela ukuza kuthi ga ngoku esinobomi. Oku kungenxa yokuba ikumgama ogqibeleleyo ukusuka elangeni ukuze ixhase amaqondo obushushu anokuxhasa ubomi ngendlela esiwazi ngayo. Noko ke, abantu abaninzi bayazibuza Kutheni uMhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka?.
Kweli nqaku siza kukuxelela ngezizathu eziphambili zokuba kutheni umhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka.
Kutheni uMhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka?
Umhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka ngenxa yobuninzi bamanzi awo, anokubonwa kwindawo enkulu eluhlaza okwesibhakabhaka. Ummandla woMhlaba umalunga ne-510 yezigidi zeekhilomitha zeekhilomitha, apho ngaphezulu kwe-70% igutyungelwe ngamanzi. Umbala oluhlaza okwesibhakabhaka uyahlula kwezinye iiplanethi ezifana neMars, iMercury, iJupiter, i-Uranus, njl.
Uninzi lwamanzi esijikelezi-langa aluhlaza amkhenkce okanye anetyuwa, kwaye inxenye nje encinci ifanele ukuselwa ngabantu. Iilwandlekazi eziphambili luLwandlekazi lweAtlantiki, uLwandlekazi lwePasifiki, uLwandlekazi lwaseIndiya, iArctic kunye neAntarctic.
Nangona ubunzulu bolwandle buhluka kwimimandla eyahlukeneyo, inxalenye enkulu yesijikelezi-langa sethu asizange sihlolwe ngenxa yokuba ilele enzulwini yolwandle. Kusenzima kakhulu ukuba abantu basebenzise bonke ubuchwephesha babo ukuze bakwazi ukubufunda buphelele.
Olu lwelo lubalulekileyo luninzi kuphela eMhlabeni, kwaye akunakwenzeka ukufumana iimpawu zobukho babo kulo naluphi na uhlobo lomzimba wendalo yethu. Ngokutsho kophando olwenziweyo ukuza kuthi ga ngoku, asikho esinye isijikelezi-langa esineelwandle kunye neoksijini eyaneleyo yokuxhasa ubomi.
Umbala obhulowu wolwandle
Umhlaba uneelwandlekazi ezintlanu eziphambili: Ulwandlekazi lwePasifiki, uLwandlekazi lweAtlantiki, uLwandlekazi lwaseIndiya, uLwandlekazi lweAntarctic kunye noLwandlekazi lweArctic. Isijikelezi-langa sethu sibonwa sisemajukujukwini njengengqukuva enkulu ezaliswe nemibala eyahlukahlukeneyo eluhlaza okwesibhakabhaka eyenziwe zizo zonke ezi lwandlekazi, nganye kuzo inombala kunye nomlinganiswa owahlukileyo.
Esi sizathu esona sizathu sokuba uMhlaba uqale ukubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka, nangona kunjalo, yayingengomanzi awanika loo mbala. Amanzi akanambala, kwaye nangona kukholelwa ukuba abonakalisa umbala wesibhakabhaka, abonakala eluhlaza okwesibhakabhaka kuphela ngenxa yobuninzi bamanzi, kwaye i-spectrum yokukhanya kunzima ukudlula kuwo, njengoko kunjalo ngolwandle.
umbala wamaza
Ubomvu, tyheli okanye luhlaza bunobude obude kunobhulowu, ngoko iimolekyuli zamanzi ziwafunxa ngokulula ngakumbi. I-Blue inobude obufutshane, ngoko ke xa kukho amanzi amaninzi kwindawo yokukhanya, kuya kubonakala okwesibhakabhaka. Kunokuthiwa umbala wamanzi uhambelana nokuqina kokukhanya, kwaye kwezinye iindawo kuqheleke kakhulu ukuba i-hue yamanzi itshintshe ibe luhlaza.
Oku kunento yokwenza nobukho be-algae, ukusondela elunxwemeni, ukuzola kolwandle ngelo xesha, kunye nentlenga eyahlukeneyo edla ngokufumaneka emanzini egxininisa umbala ngaphezu koluhlaza okwesibhakabhaka.
Kuyaziwa ukuba i-phytoplankton. iintsholongwane ezihlala emanzini ezinoxanduva lokubonelela malunga nesiqingatha seoksijini ephefumlwa ngabantu, ngokuyinxenye inoxanduva lokutshintsha kombala wamanzi.
I-Phytoplankton iqulethe i-chlorophyll kwaye ibekwe kwiindawo ezingekho nzulu kumzimba wamanzi ukuze ibambe ukukhanya okukhulu kangangoko. Xa zonke zixinaniswe kwindawo enye, ulwandle lujika lube luhlaza kakhulu endaweni yeblue blue.
Kutheni umhlaba uluhlaza xa ubonwa emajukujukwini?
Umhlaba ubungasoloko uluhlaza okwesibhakabhaka, enyanisweni, utshintshe kakhulu kwizigidi zeminyaka ubukhona. Ekuqaleni, ukubunjwa kwe-atmosfera yomhlaba kwahluke kakhulu kwinto ekhoyo namhlanje: umoya owenza isibhakabhaka, uMhlaba, okanye uMhlaba ubonakale ubhulowu ukusuka esibhakabhakeni. Ugqabhuko-dubulo lwentaba-mlilo olungaguqukiyo kwisijikelezi-langa sethu lukhupha umphunga omninzi wamanzi emoyeni, othi ekugqibeleni wenze iilwandle njengoko uzinza.
Kwezo lwandlekazi, ubulembu baqalisa ukuzalwa nokukhula. Zitya icarbon dioxide kwaye zivelise ioksijini. Ukuba sithathela ingqalelo ukuba i-carbon dioxide yayininzi kakhulu ngelo xesha kwaye kwakungekho zilwanyana ezisebenzisa ioksijini, ukwanda kwe-algae kwiinkulungwane kukwazi ukutshintsha ukubunjwa kwe-atmosfera de ifikelele kumanqanaba afana nala sinawo namhlanje. .
Inyani kukuba xa sijonga isibhakabhaka emini siluhlaza, Kwenzeka into efanayo xa siqwalasela umhlaba usemajukujukwini, umoya ojikeleze umhlaba usibonisa umbala ozuba. Oku kunento eninzi yokwenza nokwakhiwa kweatmosfera yethu kunye nethiyori yokukhanya.
Umthombo wokukhanya kwisijikelezi-langa sethu lilanga. Inkwenkwezi ikhupha iintlobo ezahlukeneyo zokukhanya esinokudibanisa ukuze sikufumane njengokukhanya okumhlophe. Ukuze sifike wethu Isijikelezi-langa kwimizuzu esi-8 emva kokushiya ilanga, oku kukhanya kufuneka kuqala kudlule kwiileya ezahlukeneyo zomoya wethu ojikeleze umhlaba. Njengoko sesitshilo, kukho iimolekyuli ezahlukeneyo ezenza umoya wethu, kodwa kuzo zonke ezi molekyuli, eyona iphambili yinitrogen. Uphawu lweemolekyuli zenitrogen kukuba xa zifumana ukukhanya, ziphinda zikukhuphe kwelinye icala ngokuxhomekeke kubude bokukhanya.
Xa ukukhanya kufikelela kwiatmosfera, imitha emide (ebomvu, eluhlaza, netyheli) ibetha phezu komhlaba okanye iphinde iphume esithubeni, ngoxa imitha eblowu emifutshane ibonakala ize isasazeke. Ngoko ke, sicinga ukuba isibhakabhaka siluhlaza.
Ukususela nini uMhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka?
Ngapha koko, igama lesiqhulo leplanethi eluhlaza okwesibhakabhaka lisandula kutshanje, nto leyo esengqiqweni xa sicinga ukuba akukabikho xesha lide oko sikwazile ukujonga inkangeleko yoMhlaba sisemajukujukwini. Inyaniso kukuba eli gama wenza ubutyebi ngeminyaka yoo-1960 noo-1970, waduma, kwaye sele esasazwa nanamhlanje.
Ngelo xesha, ihlabathi lalahlulahlulwe laba ngamaqela amabini amakhulu ezopolitiko nezoqoqosho, imibutho yobukapitali eyayikhokelwa yiUnited States kunye nemibutho yamakomanisi eyayikhokelwa yiSoviet Union. Eli xesha embalini laziwa ngokuba yiMfazwe yoMlomo kuba bekungekho ngquzulwano ngokuthe ngqo la mazwe mabini angquzulana kuzo zonke ezinye iimeko. Ebudeni bale minyaka ugqatso olubizwa ngokuba lugqatso lwasemajukujukwini lwenzeka, apho omabini la mazwe azama ukuba ngabokuqala ukuthabatha uhambo lwasemajukujukwini oluqhutywa ngabantu nokumisa eNyangeni.
Inyani kukuba i-cosmonauts yaseRashiya neyaseMelika eyaqala ukuphuma kwi-atmosfera yethu kwaye yaqaphela uMhlaba yaqaphela ukuba ukusuka "lapho" iplanethi yethu ibonakala ngathi yi-blue sphere enkulu, yiplanethi eluhlaza okwesibhakabhaka.
Ndiyathemba ukuba ngolu lwazi unokufunda ngakumbi malunga nokuba kutheni umhlaba ubizwa ngokuba yiplanethi eluhlaza okwesibhakabhaka.