Contents

Minimum thickness of crust under oceans is about…
a) 5 km                                   
b) 12 km         
c) 15 km                     
d) 20 km


Crust layer of earth is composed of…………...
a) Silicon                    
b) Aluminum
c) both a and b                       
d) None of these


Division of cores of earth includes……………
a) Inner core               
b) Fault                       
c) Outer core               
d) Both a and c


Mantle:

Layer below crust of earth is…………………
a) Mental                    
b) Core                       
c) Mountain                
d) Trench


The thickness of the mantle is about…….
a) 3,000 km                
b) 3,000 km
c) 2,600 km                
d) 2,400 km
(in 5th class GS book 3900 incorrect)


Which layer of the earth is like the white of an egg
a) Core                        
b) Crust
c) Mantle                    
d) none of these