Internal Structure Of Earth Quiz 2 (21 MCQs)

Quiz Instructions:

Select an option to see the correct answer instantly.

1. Liquid outer core is _____ thick.

2. _____ has oxides of iron, magnesium and silicon.

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

4. _____ of mental material produces convection currents beneath the surface of the earth.

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

6. Most widespread rocks in the world are:

7. Seismic waves are the result of:

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

9. An average depth of Sial varies from _____ km.

10. The crust accounts for _____ of earth's mass.

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

12. Two parts of the crust are:

13. 95% of the lithosphere is composed of:

14. _____ is the least rigid sometimes described as plastic in nature.

15. Core has a pressure of _____ times greater than the atmospheric pressure _____ billion.

16. Continental crust consists of _____ rocks.

17. According to Jaffery's division the 3rd layer is made up of _____

18. The proportion of _____ rocks decreases with depth.

19. For every 108 feet descent bellow the surface of earth temperature rises for _____

20. Hanging valleys are formed by the action of:

21. Just beneath the rigid lithosphere a soft layer of upper mental is called: