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

2. The protective layer of leaf is called

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

4. What is receptor

5. Olfactory nerves links....... and...........

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

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

8. Air contains 0.03%...........

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

10. Air contain.................. Nitrogen

11. ................. Cell has only one large vacule

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

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

14. Matter consisting of one kind of atoms is called

15. Gear system is an advanced shape of

16. Ability to do work is called

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

18. Which factor affects the soulbality of substances

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

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

21. A solution consisting of two substances is called

22. Which gass is used in photosynthesis?

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

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

25. Which substance is called universal solvent

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

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

28. The main components of environment are

29. How Many types of mixture

30. The number of naturally occurring elements is