Question : The crust is the Earth's outermost layer that is less than _______ per cent of Earth by mass, with oceanic crust and continental crust often consisting of more felsic rocks.
Option 1: 5
Option 2: 1
Option 3: 2
Option 4: 10
Correct Answer: 1
Solution : The correct option is 1 .
Earth's crust is its thick outer layer of rock, accounting for less than 1% of the planet's radius and volume. It is the uppermost layer of the lithosphere, which contains the crust and the upper portion of the mantle.
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