Thickness of crust under continents
is (average)
a) 5-70 km
b) 30-30 km
c) 50-80km
d) None of these
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
