Question

which one of the following is not a layer of earth ​

Answer 1

The complete question is:

Which one of the following is not a layer of earth?

a) sial

b) sima

c) nife

d) nickel​

Nickel is not a layer of earth. It is a white metal that belongs to the group of transition metals and is said to be present in the core of the Earth.  

• All the other options are layers of the Earth( geological terms)-

Sial-  refers to the upper layer of the Earth's crust. This layer has abundance of minerals having aluminium and silicates.

Sima- refers to the lower layer of the Earth's crust. This layer has abundance of minerals having magnesium and silicates.

Nife- refers to the core of the Earth. This layer has abundance of iron and nickel.

Answer 2

correct answer is nickel