Internal Structure Of Earth Quiz 2 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. Thickness of core is:

Correct Answer: A) 3470 Km.

2. Mesosphere extends up to ..... km:

Correct Answer: B) 2400.

3. ..... is the densest of all layers

Correct Answer: A) The core.

4. When three heavenly bodies are in same line, that situation is:

Correct Answer: C) Sizigy.

5. ..... rocks are there in oceanic crust.

Correct Answer: D) Basaltic.

6. ..... Waves move material in their path parallel to the direction of movement.

Correct Answer: A) P waves.

7. Liquid outer core is ..... thick.

Correct Answer: B) 2250 km.

8. ..... has oxides of iron, magnesium and silicon.

Correct Answer: B) Lower mental.

9. When earth and moon are nearest that position is called:

Correct Answer: A) Perigee.

10. ..... of mental material produces convection currents beneath the surface of the earth.

Correct Answer: C) Circular motion.

11. Continental crust accounts only about ..... of the earth's global surface.

Correct Answer: B) 1/3.

12. Most widespread rocks in the world are:

Correct Answer: B) Sedimentary rocks.

13. Seismic waves are the result of:

Correct Answer: C) Seismic activity.

14. When material breaks away due to earth flow it normally leaves:

Correct Answer: B) Scar or hill top.

15. An average depth of Sial varies from ..... km.

Correct Answer: C) 50-300.

16. The crust accounts for ..... of earth's mass.

Correct Answer: A) 1.01%.

17. ..... waves move objects at right angles to their direction of motion.

Correct Answer: A) S.

18. Two parts of the crust are:

Correct Answer: C) Continental crust and oceanic crust.

19. 95% of the lithosphere is composed of:

Correct Answer: B) Igneous Rocks.

20. ..... is the least rigid sometimes described as plastic in nature.

Correct Answer: C) Asthenosphere.