1. The position of earth in its orbit, when it is at its greatest distance fromaghazetaleem.com summer is called:

2. Orbital period of the planet Mercury around the sun is:

3. Which of the following is most elastic?

4. Diamond is a very expensive ornament. It is composed of a single element:

5. Fuel used in a Fast Breeder Reactor is:

6. The half life of a radioactive element is 8-days. How long it take to reduce it from 10 mg to 5 mg?

7. The number of spark plugs needed in a diesel engine is:

8. Sedimentary rocks are:

9. Which of the following layers make radio transmission possible?

10. Where do most of Asteroids lie?

11. The most splendid and the most magnificent constellation on the sky is:

12. Bronze is an alloy of: Bronze is an alloy of: Bronze is an alloy of: Bronze is an alloy of: Bronze is an alloy of:

13. A moderator is used in nuclear reactor in order to:

14. Television signals are converted into light signals by:

15. Eugenics is the study of:

16. The term 'Blue Shift' is used to indicate:

17. "Black holes" refer to:

18. Kilowatt-hour is a unit of:

19. Which of the following atmospheric layers help in radio communication?

20. Which of the following explains the reason why there is no total eclipse of the sun?

21. Monsoon is caused by: