Question

what is mean by SIMA​

Answer 1

Answer:

the layer of crust under sea bed contains mainly silica and magnesium that is why it is called SIMA

ocean crust!= SIMA

Answer 2

Answer:

SIMA is the layer of the earth's crust in the ocean floor. It consists of two substances: SI- Silica, MA- Magnesia.  

Hope this helps!