universe & solar system section 12 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (b)

Venus and possibly Uranus are the exceptions to the counterclockwise rotations of the planets. Venus travels around the sun once every 225 Earth days but it rotates clockwise once every 243 days. This peculiar combination gives it a day with respect to the sun of 117 Earth days.

Uranus is tilted on its side about 90° so its direction of rotation is ambiguous. Its angle of inclination is usually given as 98° which would mean that its direction of rotation is not retrograde. If its direction of rotation is presumed retrograde then its angle of inclination would be 82°.

Answer: (b)

India is the first Asian nation to reach Mars orbit, and the first nation in the world to do so in its first attempt.

Its Mars Orbiter Mission (MOM), also called Mangalyaan, was launched on 5 November 2013 by the Indian Space Research Organisation (ISRO).

It has been orbiting Mars since 24 September 2014.

Answer: (b)

Jupiter was named on the Roman God Zeus. Zeus is the “Father of Gods and Men” who rules the Olympians of Mount Olympus as a father rules the family according to the ancient Greek religion. He is the God of sky and thunder in Greek mythology. Zeus is etymologically cognate with and, under Hellenic influence, became particularly closely identified with Roman Jupiter.

Answer: (d)

Answer: (c)

The nuclear fuel in the sun is Hydrogen. Actually, the sun isn’t “burning,” but instead its heat and light come from its core where the element hydrogen is continuously being converted into the element helium.

This known as nuclear fusion and is basically the same thing a hydrogen bomb does.