INDIAN GEOGRAPHY

Detailed explanation-1: -Oxygen is by far the most abundant element in the Earth’s crust, making up 46% of mass-coming up just short of half of the total. Oxygen is a highly reactive element that combines with other elements, forming oxides.

Detailed explanation-2: -Oxygen is the most abundant element present in the earth’s crust. 45%-50% of the earth’s crust is made up of oxygen in the formed of oxides, carbonates and other compounds.

Detailed explanation-3: -Oxygen makes up 46.1% of the mass of Earth’s crust (the relatively thin layer of rock forming Earth’s surface), mostly in combination with other elements, while silicon makes up 28.5%. Hydrogen, the most abundant element in the universe, makes up only 0.14% of Earth’s crust.

Detailed explanation-4: -The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.