GENERAL KNOWLEDGE

GK

WORLD GEOGRAPHY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which one of the following is present in the largest amount in terms of percent by mass in the earth’s crust?
A
Silicon
B
Oxygen
C
Carbon
D
Calcium
Explanation: 

Detailed explanation-1: -Oxygen is by far the most abundant element in the earth’s crust. Scientists estimate oxygen comprises nearly half of the mass of the crust.

Detailed explanation-2: -The Earth’s core accounts for 15% of Earth’s volume but more than 30% of the mass, the mantle for 84% of the volume and close to 70% of the mass, while the crust accounts for less than 1% of the mass.

Detailed explanation-3: -Oxygen, nitrogen, hydrogen, and carbon are the most abundant elements in Earth’s biosphere.

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