61.
If there is no Sun, the colour of the sky would be ________

62.
The planet Mercury is difficult to be observed most of the time because ________

63.
The correct sequence of planets in the descending order of their equatorial diameter is ________

64.
Foucault experiment is proof of which one of the following?

65.
The distance between the Earth and the Sun (in million kms.) is ________

Read More Section(Universe)

Each Section contains maximum 70 questions. To get more questions visit other sections.