Concept:The earth's outer layers are arranged in a specific order from the surface down to the centre.
Explanation:From the surface, the first layer is the
sial, rich in silica and aluminium.
Beneath it lies the
sima, made of silica and magnesium.
These two make up the crust.
Below the crust is the
mantle.
The innermost part is the
core.
So the correct order from the surface to the interior is sial, sima, mantle and core.
Answer:D. sial, sima, mantle and core