Video narration
Amra je batas nei, tar koto ta asole oxygen? Ekta belun fuliye dhorun. Beluner bhetorer batas chokhe dekha jay na, kintu seti ekmatro gas noy, bibhinno gaser mishron. Ei beluner bataske jodi pie chart e bhag kori, tahole shushko bayur chobita porishkar dekha jay. Shobcheye boro angsho, pray 78 shotangsho, nitrogen. Eti bataser prodhan angsho. Oxygen ache pray 21 shotangsho, amra shash newar shomoy jeti byabohar kori. Baki angsho khub chhoto: argon pray 0.9 shotangsho, ar carbon dioxide pray 0.04 shotangsho. Tai chart dekhe bhul dharonati thik korun: bataser shobcheye boro angsho oxygen noy. Ar ekti kotha mone rakhun, ei shotangshogulo shushko bayur anumanik gothon. Beluner batashe joliyo bashpo thakle tar poriman jayga o abohawar shonge bodlay; eti sthir angsho noy. Tahole uttor ki? Beluner batashe oxygen matro pray 21 shotangsho; shobcheye beshi ache nitrogen, pray 78 shotangsho.