What is the outer most layer of the earth? - ProProfs
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What is the outer most layer of the earth?



A. Inner core
B. Outer core
C. Mantle
D. Crust

This question is part of Earth Layers Quiz

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2 Answers

C. Jackson

C. Jackson
Content Developer, Austin

Answered on Apr 24, 2019

The correct answer to this question is D, crust. This outer layer is hard and made of igneous, metamorphic, and sedimentary rocks. The crust is 1% of the Earth's volume. There are two different types of crust. The first is the continental crust, which is thich and under the land.

The second is the oceanic crust, which is thinner and under the ocean. The crust is comprised of 46.6% oxygen, 27.7% silicon, 8.1% aluminum, 5% iron, and the other 12.6% is comprised of various other elements. The material of the crust is a family of sillicates, feldspars, quartz, and oxides.

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John Smith

John Smith

Answered on Jan 08, 2017

Crust
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