14. Which of following is longest period of rotation:
A. Mars
B. Venus
C. Saturn
D. None of these
15. Which planet is known as Watery Planet:
A. Earth
B. Mercury
C. Mars
D. Jupiter
16. Solar system was discovered by:
A. Kepler
B. Galileo
C. Copernicus
D. Platu
17. The unit measuring distance between Stars:
A. Galactic year
B. Light year
C. Cosmic Kilometer
D. None of these
19. Which planet looks reddish in the night:
A. Mercury
B. Mars
C. Jupiter
D. Saturn
20. Which of the following is most predominant in the sun:
A. Helium
B. Hydrogen
C. Nitrogen
D. Ozone