Suv noyob moddadir. U qaysi holatda eng yuqori zichlikka ega (ya’ni bir xil hajmda og’irroq bo’ladi)?, Muz holatida (0^C), Bug’ holatida (100^C), +4^C haroratdagi suyuq holatda, +20^C haroratdagi suyuq holatda, Yer yuzining qariyb 71 foizi suv bilan qoplangan. Yer yuzidagi jami suv zaxirasining necha foizini ichishga yaroqli chuchuk suv tashkil etadi?, Taxminan 50%, Taxminan 25%, Taxminan 10%, Taxminan 3%, Suv universal erituvchi hisoblanadi. Suv molekulasining ($H_{2}O$) qaysi xususiyati unga boshqa moddalarni oson eritish imkonini beradi?, Yuqori qovushqoqligi, Qutbliligi (molekula «+» va «-» qutbli kichik magnit kabi ishlaydi), Rangsiz va hidsizligi, Tez bug’lanish xususiyati, Dunyodagi eng chuqur va dunyodagi jami ko’l chuchuk suv zaxirasining 20 foizini o’zida saqlaydigan ko’l qaysi?, Kaspiy dengizi, Viktoriya ko’li, Baykal ko’li, Yuqori ko’l (Lake Superior).

Sam - Uzbek

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