1. The main components of environment are

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

3. The protective layer of leaf is called

4. Air contain.................. Nitrogen

5. How Many types of mixture

6. Gear system is an advanced shape of

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

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

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

10. What is receptor

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

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

13. The number of naturally occurring elements is

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

15. Which substance is called universal solvent

16. A solution consisting of two substances is called

17. Matter consisting of one kind of atoms is called

18. Which factor affects the soulbality of substances

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

20. Which gass is used in photosynthesis?

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

22. Ability to do work is called

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

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

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

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

27. ................. Cell has only one large vacule

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

29. Olfactory nerves links....... and...........

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