1. Which one of the following is the dominant element of the earth crust ?

1. 1. Aluminium

   
   
   

   2. Iron

   
   
   

   3. Oxygen

   
   
   

   4. Silicon

   
   
   

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   Oxygen

   Correct Option: C

   Oxygen

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2. Gutenberg discontinuity separates

1. 1. Crust from the upper mantle

   
   
   

   2. Upper mantle from lower mantle

   
   
   

   3. Lower mantle from outer core

   
   
   

   4. Outer core from the inner core

   
   
   

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   Lower mantle from outer core

   Correct Option: C

   Lower mantle from outer core

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3. The largest volume and mass of the earth is found in

1. 1. Crust

   
   
   

   2. Mantle

   
   
   

   3. Outer core

   
   
   

   4. Inner core

   
   
   

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   Mantle

   Correct Option: B

   Mantle

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4. Who divided the interior of the earth in Lithosphere, Asthenosphere, Mesosphere and Centrosphere ?

1. 1. Suess

   
   
   

   2. Kelvin

   
   
   

   3. Daily

   
   
   

   4. None of these

   
   
   

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   Daily

   Correct Option: C

   Daily

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5. What does the tern 'sial' refer to ?

1. 1. Earth's surface layer

   
   
   

   2. The core part of the earth

   
   
   

   3. Ocean bottom rocks

   
   
   

   4. A rock which is rich in calcium

   
   
   

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   Earth's surface layer

   Correct Option: A

   Earth's surface layer

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