Answer:
B, C, D
Explanation:
The following statements are true regarding the continental crust;
It is between 25 and 70 km thick
Its made of all types of rocks
It contains silicate minerals high in sodium, potassium, aluminum, and calcium
Answer: Option (B), (C) and (D)
Explanation: Continental crust is a thick plate that comprises of sedimentary, metamorphic and igneous types of rocks. They are less denser compared to the oceanic crust and usually have a thickness of about 35-40 km, and increases upto 75-80 km at the mountain ranges. It often contains silicate minerals, that are mainly enriched in sodium, aluminium, calcium and potassium.
Thus, the correct options are mentioned above.
