How is the distribution of the elements in the Earth's crust?

Question:

How is the distribution of the elements in the Earth's crust?

Earth's crust:

A crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of volcanic, unstable, and sedimentary rocks. The crust is underlain by the mantle. The crust is only about 5 miles thick under the oceans and about 30 miles thick under the continents.

Answer and Explanation:

The abundance by mass of the nine most abundant elements in the Earth's crust is approximately:

oxygen 46%,

silicon 28%,

aluminum 8.3%,

iron 5.6%,

calcium 4.2%,

sodium 2.5%,

magnesium 2.4%,

potassium 2.0%,

titanium 0.61%.


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The Internal Layers & Structure of the Earth

from NYSTCE Earth Science (008): Practice and Study Guide

Chapter 2 / Lesson 3
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