1. Air contain.................. Nitrogen

2. Ability to do work is called

3. Hailey's comet is visible after every...............?

4. Ded red blood corpuscles are stored in.......?

5. Leaves are narrow and pointed

6. Cactus is found in

7. Convection occurs only in.

9. The biotic components of the environment Include..............

10. Rate of flow of charge is called

11. Dead plants and animals are

12. Gear system is an advanced shape of

14. Animals are called

15. Electron was discovered by?

16. What is present in gastric juice?

17. ............... are reproductive organs of plants.

18. The perpendicular force acting on unit surface area of an object is called...............?

19. What is the largest gland in the human body?

20. Deficiency of vitamin_A results in?

21. The formation of ghee from vegetable oil is an example of.............

22. The study of Plants and animals is called

23. The heaviest naturally occurring element is..............?

24. The part of the solution which is less in quantity called

25. Algae Clour is

26. Animals are divided into _ large subgroups

27. The speed of sound is........... Meter per second in iron

29. ....................... Is a friendly relationship between two organisms

30. The whorl of sepals is called..........

31. The largest artery is named as

32. The valency of carbon atom is.............?

33. Voltmeter is used for measurement of............

34. The number of protons present in the nucleus of one atom of any element is called its

35. The mirror used in the Automobiles are................?

36. According to ............. Law Resistance is calculated by dividing voltage by current

37. Largest bird in the world is

39. Plants are called

40. Olfactory nerves links....... and...........

41. Rusting of iron involves...................?

42. The international system of units was introduced in

44. ............... React chemically with fat or oil to form soap

45. The number of naturally occurring elements is

47. Boiling of an egg is change which is.............?

48. Bacteria are kept in separate kingdom called

49. The animals which kill and hunt other animals for food called