Question

what is sial and silica​

Answer 1

Explanation:

geology, the term 'sial' refers to the composition of the upper layer of the Earth's crust, namely rocks rich in silicates and aluminium minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but "sial" is a geochemical term rather than a plate tectonic term. As these elements are less dense than the majority of the earth's elements, they tend to be concentrated in the upper layer of the crust.

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Answer 2

Answer:

1.sail

2.silica

Explanation:

1. a piece of material extended on a mast to catch the wind and propel a boat or ship or other vessel.

2.a hard, unreactive, colourless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.