Question

rocks and soils form the .........layer of the crust

Answer 1

.........,..............upper layer

Answer 2

According to the Big Bang Theory our Earth was formed by an explosion in the sun where many segments from the sun seperately created today's planetary system.

Our earth is also one of those segments which solidified and formed as the current earth.

During this solidification process the inner part of our planet divided into many layers the uppermost layer is known as the crust.

So the answer will be;

Rocks and soil forms the "Upper" layer of the crust.