The chemical composition of the Earth,s crust is dominated by ..... elements which together make up more than 99 percent by weight and volume of the crust.

EARTH SCIENCE

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

The chemical composition of the Earth,s crust is dominated by ____ elements which together make up more than 99 percent by weight and volume of the crust.

A	4
B	6
C	8
D	9

Explanation:

Detailed explanation-1: -There are 92 naturally occurring elements on earth but only eight elements make over 98% of the minerals on the Earth’s crust. They are, in decreasing quantity, 1 oxygen, 2 silicon, 3 aluminum, 4 iron, 5 calcium, 6 sodium, 7 potassium, 8 magnesium.

Detailed explanation-2: -The Earth’s crust comprises about 95% igneous and metamorphic rocks, 4% shale, 0.75% sandstone, and 0.25% limestone. Oxygen, silicon, aluminum, and iron account for 88.1% of the mass of the Earth’s crust, while another 90 elements make up the remaining 11.9%.

Detailed explanation-3: -You should learn the symbols for the eight most abundant elements in the Earth’s crust (Oxygen (O), Silicon (Si), Aluminum (Al), Calcium (Ca), Iron (Fe), Magnesium (Mg), Sodium (Na), and Potassium (K) .

Detailed explanation-4: -About 98% of the total crust is made up of eight elements as oxygen, silicon, aluminium, iron, calcium, sodium, potassium, and magnesium. The rest is constituted by elements like titanium, hydrogen, phosphorous, manganese, sulphur, carbon, nickel and others.

There is 1 question to complete.