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

2. Matter consisting of one kind of atoms is called

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

4. Which factor affects the soulbality of substances

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

6. Gear system is an advanced shape of

7. Air contains 0.03%...........

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

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

10. The protective layer of leaf is called

11. Air contain.................. Nitrogen

12. Ability to do work is called

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

14. How Many types of mixture

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

16. The main components of environment are

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

18. A solution consisting of two substances is called

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

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

21. Which substance is called universal solvent

22. Which gass is used in photosynthesis?

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

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

25. Olfactory nerves links....... and...........

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

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

28. What is receptor

29. ................. Cell has only one large vacule

30. The number of naturally occurring elements is