1. The number of naturally occurring elements is

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

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

4. Which factor affects the soulbality of substances

5. The protective layer of leaf is called

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

7. How Many types of mixture

8. The main components of environment are

9. Ability to do work is called

10. A solution consisting of two substances is called

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

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

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

14. Which gass is used in photosynthesis?

15. Gear system is an advanced shape of

16. Olfactory nerves links....... and...........

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

18. Which substance is called universal solvent

19. Air contains 0.03%...........

20. Matter consisting of one kind of atoms is called

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

22. ................. Cell has only one large vacule

23. Air contain.................. Nitrogen

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

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

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

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

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

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

30. What is receptor