A aji na biyu, ɗalibai za su fara yin nazari na yau da kullun game da batutuwa. Amma a wannan shekarun yara suna koyon ƙwarewar ilimin da ke sha'awarsu. Abu daya ne a san cewa ruwa ya zama dole ga mutum don kula da rayuwa, kuma ba wani abu bane gano cewa mutum yana shan tankin ruwa na jirgin ƙasa baki ɗaya a rayuwarsa. Anan ga ƙananan zaɓi na gaskiya waɗanda zasu iya sa nazarin tarihin halitta ya zama mai ban sha'awa.
1. A cikin ɗayan jihohin Amurka, wani nau'in itacen apple yana girma tare da asalinsa mai zurfin gaske, yana ratsa ƙasa sama da kilomita. Kuma tsawon tsawon tushen irin wannan itacen apple zai iya wuce kilomita 4.
2. Akwai nau'ikan kifayen dubu 200 a yanayi. Idan kun hada yawan nau'in amphibians, dabbobi masu rarrafe, tsuntsaye da dabbobi, zasu zama kadan daga cikinsu, saboda haka kifayen suna da yawa.
3. Kimiyyar kifi ita ake kira ichthyology. Masana kimiyya sun gano cewa kifayen ko da jinsin daya ya dace da tafkin da suke rayuwa, kalar kasa, tsarkin ruwa da gurbatar shi. Kifi na iya canza launi, fasali har ma da girma.
4. A rayuwarsa, mutum ya sha tan 75 na ruwa. Kuma sunflower yana buƙatar lita 250 don yayi girma da fruita fruita. A lokaci guda, sunflower din ba zai bushe ba, bayan ya kwashe makonni biyu ba tare da ruwa ba, kuma a wannan lokacin babu makawa mutum zai mutu.
5. Dankali, karas, radishes ba 'ya'yan itace bane, amma asalinsu. Yanayi da mutum sun canza su don amfanin kansu. Ba tare da sa hannun ɗan adam ba, waɗannan asalinsu, ana kuma kiransu tushen amfanin gona, da sun kasance tushen asalin. Kuma tare da kyakkyawar kulawa, tushen albarkatu na iya zama babba - a cikin Tajikistan, ta wata hanyar da ke da nauyin kilogiram 20 ta girma.
6. Ruwa ya mamaye kaso 71% na doron kasa. Koyaya, a cikin miliyoyin kilomita mai siffar sukari, kusan kashi 2% ne kawai ke da ruwa mai ɗaci, kuma duk da haka ba duka ya dace da mutane ba. Saboda haka, duk mazaunin Duniya na bakwai an hana su samun ruwan sha kyauta.
7. Kifi ne kawai ke da gabobin ji na musamman - layin gefe. Yana tafiya kusan a tsakiyar jikin kifin a bangarorin biyu. Tare da taimakon layin gefe, kifin yana sarrafa yanayin da ke kewaye da su ba tare da amfani da idanunsu ba.
8. Kowane sikelin kifi yana kama da zoben shekara-shekara akan yankewar itace, zobba ne kawai akan sikelin basa wakiltar shekaru, amma yanayi. Kunkuntar tazara tsakanin zobba lokacin sanyi ne kuma mafi girma shine bazara. Don gano shekarun kifin, kuna buƙatar ƙididdige zoben kuma raba lambar da ta haifar da 2.
9. Bishiyoyi masu tsayin mita 100 ko sama da haka ba su da yawa. Amma ga ɗayan nau'in algae na launin ruwan kasa, wannan kusan tsawon kowa ne. Wasu daga cikinsu suna girma har zuwa mita 300. Kaurin irin wadannan algae da kuma halin da suke ciki suna sanya su kwatankwacin irin macen macizan teku.
10. Mafi girman kifi a duniya shine sarki herring, ko bel belt. Matsakaicin kifin wannan nau'in yana da tsawon mita 3, kuma masu rikodin suna girma har zuwa mita 11. Ana samun mafi ƙanƙan kifi a cikin Philippines kuma yana girma zuwa milimita 12 kawai.
11. A Italiya, kusa da bakin dutsen Etna, an goga wata itacen kirji, wanda girman diamita a jikinsa ya kai mita 58 - wannan rabin tsayin filin wasan kwallon kafa ne. A cewar tatsuniya, sarauniyar da ke wucewa tare da manyan abokanta an kama su a cikin tsawa kuma sun sami damar ɓoyewa a ƙarƙashin bishiya ɗaya, saboda haka ana kiranta kirjin dawakai ɗaruruwan. Sarauniya da sahabbanta, wataƙila, ba su san dokoki mafi sauƙi na rayuwa ba - a cikin kowane hali ya kamata ku ɓoye a ƙarƙashin bishiyoyi, musamman ma masu tsayi, a cikin hadari. Dogayen bishiyoyi suna jan hankalin walƙiya.
12. A kasar Barazil, akwai wani nau'in dabino wanda ake kira Rafia Tedigera. Kowane ganyen dabino tsaka ce mai tsawon mita 5, a kanta ganye mai tsayin mita 20 kuma faɗinsa ya kai mita 12. Irin wannan girman yana sanya shi kwatankwacin ƙofar wani bene mai hawa 5.
13. Masana kimiyya sun binciki ruwa na halitta don tsafta a cikin sama da kasashe 120 a duniya. An samo ruwa mafi tsafta a Finland. Akwai yanayi mai sanyi, yawan albarkatun ruwa (ana kiranta Finland da "ofasar tafkuna dubu)" kuma ƙa'idodin dokokin mahalli suna ba da gudummawa ga tsabtace ruwan.
14. Abin ban mamaki Velvichia, yana girma a Afirka, yana samar da ganye biyu ne kawai a cikin rayuwar shi duka. Amma kowane ɗayansu ya yi tsalla aƙalla mita 3 a tsayi, kuma aƙalla sama da 6. Gwanin Velvichia yayi kama da kututture - yana tsayi a tsayi da mita ɗaya kawai, yana iya kai wa mita 4 a faɗi.
15. A tsibirin Sicily na kasar Italia akwai wani tushe, wanda ruwan sa mai mutuwace ne - an narke shi da sinadarin sulphuric acid daga tushen dutsen mai fitad da wuta.
16. Mita 1 - wannan shine girman fure mafi girma a duniyarmu. A lokaci guda, Rafflesia Arnold - kamar yadda ake kira - ba shi da tushe, ko tushe, ko ganye - yana yin parasitizes a kan manyan tsire-tsire masu zafi, yana manne da su.
17. Da kyar aka ga fure mafi ƙaranci a duniya ba tare da kyan gani ba - diamita na furen ɗayan nau'in duckweed rabin milimita ne kawai.
18. Antarctica sananne ne ba kawai don Kudu ta Kudu da yanayin sanyi ba. Akwai tabki wanda yake da ruwa mai gishiri sosai a nahiyar. Idan ruwan teku na yau da kullun, saboda gishirin sa, ba daskarewa ba a digiri 0, amma a -3 - -4, to ruwan Tekun Antarctic ya zama kankara ne kawai a -50 digiri.
19. A kasar Japan, daruruwan mutane na mutuwa sanadiyar gubar puffer da ake fiskanta a kowace shekara. Wannan kifin babban abinci ne ga Jafanawa, amma wasu sassan jikinsa suna da dafi mai haɗari. Masu dafa abinci suna cire su, amma wani lokacin suna kuskure. Duk da rasuwarsa, fugu ya ci gaba da zama sanannen abu.
Kifi Puffer
20. A cikin Azerbaijan mai arzikin mai akwai wani tafki mai dauke da irin wadataccen mai da iskar gas har ruwan da ke cikinsa ya kone.
