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

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

3. A solution consisting of two substances is called

4. What is receptor

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

6. Gear system is an advanced shape of

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

8. How Many types of mixture

9. Air contains 0.03%...........

10. Which gass is used in photosynthesis?

11. The number of naturally occurring elements is

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

13. Ability to do work is called

14. Olfactory nerves links....... and...........

15. Which substance is called universal solvent

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

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

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

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

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

21. Which factor affects the soulbality of substances

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

23. ................. Cell has only one large vacule

24. Air contain.................. Nitrogen

25. The main components of environment are

26. The protective layer of leaf is called

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

28. Matter consisting of one kind of atoms is called

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

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