1. The main components of environment are

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

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

4. A solution consisting of two substances is called

5. Ability to do work is called

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

7. Matter consisting of one kind of atoms is called

8. Which substance is called universal solvent

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

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

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

12. Gear system is an advanced shape of

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

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

15. Air contain.................. Nitrogen

16. What is receptor

17. The number of naturally occurring elements is

18. Olfactory nerves links....... and...........

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

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

21. The protective layer of leaf is called

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

23. Air contains 0.03%...........

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

25. How Many types of mixture

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

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

28. Which gass is used in photosynthesis?

29. Which factor affects the soulbality of substances

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