1. .................. is used in electric bulbs and flourescent lamps

2. Ability to do work is called

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

4. The energy in an object due its pissition is called

5. The energy in an object due its motion is called

6. A solution consisting of two substances is called

7. Air contain.................. Nitrogen

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

9. Gear system is an advanced shape of

10. Meteoroid which burns after entering earth's atmosphere is called

11. The structural and functional unit of life is called ....................

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

13. A spherical mirror whose inner surface is reflecting is called

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

15. Matter consisting of one kind of atoms is called

16. Which factor affects the soulbality of substances

17. The protective layer of leaf is called

18. Air contains 0.03%...........

19. America launched its first space station skylab into space in

20. What is receptor

21. Which gass is used in photosynthesis?

22. The particles are settled down at the bottom of the container.

23. The main components of environment are

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

25. How Many types of mixture

26. Which of the following is not detected by skin?

27. Olfactory nerves links....... and...........

28. The number of naturally occurring elements is

29. Which substance is called universal solvent

30. ................. Cell has only one large vacule