universe & solar system section 12 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Earth is the third planet from the Sun in the following order from the Sun: Mercury, Venus, Earth, and Mars.

The four smaller inner planets, Mercury, Venus, Earth, and Mars, also called the terrestrial planets, are primarily composed of rock and metal.

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: (d)

Answer: (d)

The distance of moon from the Earth is 364 thousands kms. The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System.

It is the largest natural satellite of a planet in the Solar System relative to the size of its primary, having 27% the diameter and 60% the density of Earth, resulting in 1? 81 its mass.

Answer: (d)