Question

Which statements describe continental crust? Select the three correct answers. A. It is made of all types of rocks. B. It is between 25 and 70 km thick. C. It is relatively young (less than 180 million years old). D. It contains silicate minerals high in sodium, potassium, aluminum, and calcium. E. It is formed at zones of volcanic activity on the ocean floor.

Answer 1

The correct answer is A, C, and D.

Answer 2

Answer:

The answer is: A, B, D.

Explanation:

A.- Continental Bark is formed by rocks of all kinds. In the deepest areas, metamorphic rocks predominate.

B.- The earth's crust is the solid surface layer of the Earth, it is a very thin layer and is composed of a continental crust, with an average thickness of about 35 km. It can reach thicknesses of 70 km.

D.- The continental crust has a different chemical composition compared to the oceanic crust, it is mainly composed of: silicates oxides with a certain amount of aluminum: Feldspars, sodium, potassium, and calcium.

The answer is: A, B, D.