SOLAR SYSTEM

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.

Detailed explanation-2: -Oxygen accounts for 46.6% of earth’s crust, nitrogen is negligible in earth’s crust and it is 3.3% in human body, Silicon is the next to oxygen in abundance in soil (27.7%) and hydrogen is 0.5% in human body and in earth’s crust 0.14% by weight.

Detailed explanation-3: -Oxygen is the most abundant element present in the earth’s crust. Around 40-50% of the earth’s crust is oxygen.

Detailed explanation-4: -By composition, dry air contains approximately 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Oxygen is approximated to be 21% because it’s actual value leans closer to 21%.

Detailed explanation-5: -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 28.2%.