CSS[FPSC-U.S. Civil Service Commission]-USA MCQ Quiz Hub

[USA] Current Affairs 2021 Set 11

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1. The interior structure of the Earth is divided into ________ layers.




2. We live on the Earths




3. The thickest layer of the Earth is




4. The outermost layer of the Earth is




5. The Earths crust ranges from ________ km in depth.




6. The Earths internal heat mainly comes from




7. There are different seasons on the Earth because of




8. On average, Air contains ________ % of water vapours.




9. Earths troposphere extends from the Earths surface to an average height of about ________ km.




10. The science of lightning is called




11. Ships use ________ to find the depth of the ocean beneath them.




12. Molecules with identical molecular formulae but with different structural formulae are called




13. The anode is the electrode connected to the ________ terminal of a battery.




14. The unit used to measure humidity is




15. Laser was invented by




16. The vernier calipers is used to measure




17. Atomic clock is used to measure ______ intervals of time.




18. 1 tonne = ________ kg




19. An instrument used to measure atmospheric pressure is




20. An instrument used to measure gas pressure is




21. Which electromagnetic wave has the longest wavelength?




22. Which electromagnetic wave has the shortest wavelength?




23. All electromagnetic waves have the same




24. The reflection of sound is called




25. An instrument used to measure electric current is called




26. The SI unit of thermodynamic temperature is




27. The shortest distance between crest to crest is called




28. The speed of sound is fastest in




29. The speed of sound is slowest in




30. Radioactivity was discovered by




31. Which from the following has the greatest ionizing power?




32. Which from the following has the greatest penetrating power?




33. Which from the following has the greatest speed?




34. At night




35. The chemical name of chalk is




36. The branch of science which study the interaction between matter and radiant energy is called




37. The horizontal rows of the periodic table are called




38. The vertical columns of the periodic table are called




39. Which metallic element is liquid at room temperature?




40. Which non-metallic element is liquid at room temperature?




41. Battery charger converts electrical energy into ______ energy.




42. A loudspeaker changes ______ energy into sound energy.




43. The strongest part(s) of a magnet is/are




44. Electromagnetic induction was discovered by




45. Battery was invented by




46. The most abundant form of matter in the universe is




47. When gas is ionized, ________ forms.




48. Wind is caused by




49. Wind speed is measured by




50. The fact that universe is expanding was discovered by