MCQ on Inside Our Earth
1- The uppermost layer over the earth’s surface is called ………………..
(A) Crust
(B) Mantle
(C) Inner Core
(D) Outer Core
2- Which is the thinnest layer of the earth?
(A) Crust
(B) Mantle
(C) Inner Core
(D) Outer Core
3- Crust is about ………….km on the continental masses and only ………..km on the ocean floors.
(A) 5, 35
(B) 35, 5
(C) 25, 5
(D) 5, 25
4- Which of the following minerals constituents the continental mass of crust?
(A) Silica
(B) Alumina
(C) Both A and B
(D) None of the above
5- The continental crust mainly consist of Silica and Alumina therefore it is called……………
(A) Sima
(B) Nife
(C) Simal
(D) Sial
6- The oceanic crust mainly consists of Silica and Magnesium therefore it is called ……………
(A) Sial
(B) Sima
(C) Nife
(D) Simal
7- Where is the deepest mine located in the world?
(A) South America
(B) South Africa
(C) Australia
(D) Argentina
8- Mantle extends up to a depth of …………….km below the crust.
(A) 4900
(B) 3900
(C) 2900
(D) 1900
9- Which is the innermost layer of the earth?
(A) Core
(B) Mantle
(C) Crust
(D) None of the above
10- What is the radius of the core?
(A) 3500 km
(B) 2500 km
(C) 1500 km
(D) 500 km
ANSWERS:
1-(A), 2-(A), 3-(B), 4-(C), 5-(D), 6-(B), 7-(B), 8-(C), 9-(A), 10-(A)