1. Gear system is an advanced shape of

2. The protective layer of leaf is called

3. Ability to do work is called

4. The number of naturally occurring elements is

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

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

7. Which substance is called universal solvent

8. ................. Cell has only one large vacule

9. The main components of environment are

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

11. Which gass is used in photosynthesis?

12. What is receptor

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

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

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

16. Air contain.................. Nitrogen

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

18. Which factor affects the soulbality of substances

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

20. Olfactory nerves links....... and...........

21. Matter consisting of one kind of atoms is called

22. Air contains 0.03%...........

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

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

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

26. How Many types of mixture

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

28. A solution consisting of two substances is called

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

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