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

Answer: (b)

The planet Pluto has been declared as a dwarf planet in the summit held in Prague. In August 2006 the International Astronomical Union (IAU) downgraded the status of Pluto to that of a “dwarf planet.”

This means that from now on only the rocky worlds of the inner Solar System and the gas giants of the outer system will be designated as planets.

Answer: (d)

Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, an ultraviolet light.

On Earth, sunlight is filtered through the Earth’s atmosphere, and is obvious as daylight when the Sun is above the horizon.

Answer: (b)

The Earth rotates around its axis from west to east. Earth’s rotation is the rotation of the solid Earth around its own axis. The Earth rotates from the west towards the east. As viewed from the North Star or polestar Polaris, the Earth turns counter-clockwise.

Answer: (c)

Answer: (a)

Eris is the most massive and second-largest dwarf planet known in the Solar System. It is 27% more massive than dwarf planet Pluto. Eris is the ninthmost-massive known body directly orbiting the Sun, and the largest known body in the Solar System not visited by a spacecraft.

Answer: (a)

111 Kms are represented by 1 degree latitude.