Question

what is the composition of the earth crust​

Answer 1

Tarbuck, Earth's crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent.

Answer 2

Explanation:

The composition of Earth Crust:

The crust is the outermost solid part of the earth. It is brittle in nature. The thickness of the crust varies under the oceanic and continental areas. Oceanic crust is thinner as compared to the continental crust. The thickness of oceanic crust is 5km whereas that of the continental is around 30km. The crust ismafe up of heavier rocks.

Earth's crust is made up of several elements. They are:

1. Oxygen - 46.6 percent

2. Silicon - 27.7 percent

3. Aluminum - 8.1 percent

4. Iron - 5 percent

5. Calcium - 3.6 percent

6. Sodium - 2.8 percent

7. Potassium - 2.6 percent

8. Magnesium - 2.1 percent