Thu. Jun 25th, 2026

Earth Interior

  1. The average thickness of the continental crust is about?

    Options:
    1. 5 km
    2. 10 km
    3. 35 km
    4. 2900 km

    Option: C

  2. The oceanic crust is thinner than continental crust. What is its average thickness?

    Options:
    1. 5 km
    2. 10 km
    3. 35 km
    4. 50 km

    Option: A

  3. The innermost layer of the Earth is mainly made of?

    Options:
    1. Iron and Nickel
    2. Silica and Aluminium
    3. Silica and Magnesium
    4. Basalt and Granite

    Option: A

  4. Which layer of the Earth is the thickest among all?

    Options:
    1. Crust
    2. Mantle
    3. Outer core
    4. Inner core

    Option: B

  5. The term SIAL refers to the composition of which part of the Earth?

    Options:
    1. Upper crust
    2. Mantle
    3. Outer core
    4. Inner core

    Option: A

  6. The term SIMA is used for the composition of which Earth layer?

    Options:
    1. Lower crust
    2. Mantle
    3. Outer core
    4. Inner core

    Option: B

  7. The innermost part of the Earth is in which state?

    Options:
    1. Completely liquid
    2. Completely solid
    3. Rigid solid
    4. Semi solid

    Option: B

  8. The outer core of the Earth is in which state?

    Options:
    1. Solid
    2. Liquid
    3. Gaseous
    4. Semi solid

    Option: B

  9. Which discontinuity marks the boundary between outer core and inner core?

    Options:
    1. Gutenberg
    2. Mohorovicic
    3. Lehmann
    4. Conrad

    Option: C

  10. Which seismic waves are responsible for creating shadow zones on Earth?

    Options:
    1. P and S waves
    2. Only S waves
    3. Only P waves
    4. Surface waves

    Option: A

  11. Which type of rocks form the oceanic crust mainly?

    Options:
    1. Basalt
    2. Granite
    3. Sandstone
    4. Marble

    Option: A

  12. Granite is the chief constituent of which crust?

    Options:
    1. Oceanic crust
    2. Continental crust
    3. Mantle
    4. Core

    Option: B

  13. The density of continental crust is about?

    Options:
    1. 2.7 g cm-3
    2. 3.0 g cm-3
    3. 5.0 g cm-3
    4. 11 g cm-3

    Option: A

  14. The density of oceanic crust is about?

    Options:
    1. 2.7 g cm-3
    2. 3.0 g cm-3
    3. 5.0 g cm-3
    4. 11 g cm-3

    Option: B

  15. Which part of Earth is mainly responsible for generating the magnetic field?

    Options:
    1. Crust
    2. Mantle
    3. Outer core
    4. Inner core

    Option: C

  16. The temperature at the center of the Earth is estimated to be around?

    Options:

    Option: C

  17. The Mohorovicic discontinuity was discovered in 1909 after which earthquake?

    Options:
    1. California earthquake
    2. Zagreb earthquake
    3. Tokyo earthquake
    4. Chile earthquake

    Option: B

  18. Which scientist proposed the existence of inner core in 1936?

    Options:
    1. Gutenberg
    2. Lehmann
    3. Mohorovicic
    4. Oldham

    Option: B

  19. Which layer of the Earth shows convection currents responsible for plate movements?

    Options:
    1. Crust
    2. Mantle
    3. Outer core
    4. Inner core

    Option: B

  20. The asthenosphere lies just below which layer?

    Options:
    1. Inner core
    2. Crust
    3. Lithosphere
    4. Outer core

    Option: C