Duniya ke oceans kaun se hain?

Sabse bade jal-bhandaar

Antariksh se Prithvi neeli dikhti hai kyunki iski satah ka lagbhag teen-chauthaai hissa paani hai. Globe par sabse bade jal-bhandaar oceans hain. Inke chhote hisson ke aur naam hain, jaise sea, bay ya gulf.

Paanch oceans

World map par paanch oceans dikhte hain: Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean aur Southern (ya Antarctic) Ocean. Size ke hisaab se:

1. Pacific, sabse bada
2. Atlantic
3. Indian
4. Southern
5. Arctic, sabse chhota

Oceans aur hemispheres

Equator, Prithvi ko Northern aur Southern Hemisphere mein baantta hai. Kuch oceans dono mein hain:

Ocean	Northern Hemisphere	Southern Hemisphere
Pacific	Haan	Haan
Atlantic	Haan	Haan
Indian	Haan (chhota hissa)	Haan (zyaadatar)
Southern	Nahi	Haan
Arctic	Haan	Nahi

Southern Hemisphere mein Northern se kahin zyaada paani hai, jabki Northern mein zyaada zameen hai.

Ek juda hua ocean

Haalaanki hum paanch oceans ginte hain, ye sach mein alag nahi hain. Map par inhe baantne waali lines maanyataayein hain, aur prakriti aisi seemaayein nahi maanti. Samudri paani lagaataar ek ocean se doosre mein behta hai, poshak tatva aur garmi le jaata hai, aur kai paudhon aur jaanwaron ki prajaatiyan kai oceans mein milti hain.

Oceans mein jeevan

Marine ka matlab hai oceans aur samudron se juda ya unme milne waala. Samudri flora mein algae naam ke chhote paudhe aur har tarah ke seaweeds hain; samudri fauna mein hazaaron tarah ki rang-birangi machhliyan, dolphins, whales, sharks, samudri kachhue, starfish aur anginat rahasyamay gehre samudr ke jeev hain. Coral reefs tropical machhliyon ka ghar hain, aur emperor penguins barfeele Southern Ocean ke kinaare rehte hain. Ocean ke har hisse mein, roshni waali satah se andhere gehraai tak, apne jeev hain.

Indian Ocean aur India

Indian Ocean ke uttar mein Asia, paschim mein Africa aur poorv mein Australia hai, aur dakshin mein Southern Ocean. India ke dono taraf iske do hisse hain: paschim mein Arabian Sea aur poorv mein Bay of Bengal. India ke do bade island samooh inme hain: Arabian Sea mein Lakshadweep Islands aur Bay of Bengal mein Andaman aur Nicobar Islands.

Khaara paani

Oceans grah ka zyaadatar paani rakhte hain, par ye khaara hai aur insaan ya zyaadatar zameeni jaanwar ise nahi pee sakte. Meetha paani, jo glaciers, nadiyon, jheelon, hawa aur zameen ke neeche milta hai, bahut chhota hissa hai. Isliye ‘blue planet’ par bhi paani bachaana zaroori hai.

Oceans, baarish aur aapdaayein

Oceans ke upar bane baadal zameen par baarish laate hain; India har garmi mein jis monsoon ka intezaar karta hai wo ocean se aata hai. Par oceans cyclone bhi banaate hain, bahut tez baarish ya hawaon waale bhayankar toofaan jo tat ko nuksaan pahunchaate hain, aur tsunami, vishaal lehrein jo aam taur par ocean ke tal ke neeche bhookamp ya jwaalamukhi se banti hain.

26 December 2004 ko Indonesia ke bhookamp se aayi tsunami ne India aur 13 aur deshon ko maara, aur do lakh se zyaada logon ki jaan gayi. Early warning systems, jaise Indian Ocean Tsunami Warning System, ab jaanein bachaane mein madad karte hain.

Oceans ko bachaana kyun zaroori hai

Oceans baarish dete hain, duniya ki aadhi se zyaada oxygen banaate hain aur karodon logon ko khaana dete hain, phir bhi hum har saal kai million tonne plastic inme phenkte hain, aur zaroorat se zyaada machhli pakadna samudri jeevan ko ghataata hai. Zameen ke baare mein duniya ke continents mein padho, ya poore chapter ke liye Chapter 2 notes dekho.