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

Question : 1

Arrange the planets given below in order of increasing distance from Sun?

1. Neptune
2. Earth
3. Jupiter
4. Uranus

a) 3, 2, 4, 1

b) 1, 2, 4, 3

c) 4, 3, 2, 1

d) 2, 3, 4, 1

Question : 2

Plate tectonics is a scientific theory that describes the large-scale motions of Earth’s lithosphere. Which one among the following statements regarding Plate tectonics is not correct?

a) The Earth’s lithosphere is broken up into Tectonic Plates

b) Along divergent plate boundaries, subduction carries plates into the mantle

c) Tectonic plates are able to move because the Earth’s lithosphere has a higher strength than the underlying asthenosphere

d) Tectonic plates are composed of Oceanic lithosphere and thicker Continental lithosphere

Question : 3

The planets on either side of the Earth are

a) Venus and Saturn

b) Mars and Venus

c) Mercury and Venus

d) Mars and Jupiter

Question : 4

One Astronomical Unit is the average distance between

a) Jupiter and the Sun

b) Pluto and the Sun

c) Earth and the Moon

d) Earth and the Sun

Question : 5

Hydrogen, Helium and Methane are the main gases present on

a) Uranus, Neptune and Venus

b) Mars and Venus

c) Jupiter, Saturn and Mars

d) Uranus, Neptune and Mars

Question : 6

The tail of a comet is directed away from the sun because

a) The radiation emitted by the sun exerts a radial pressure on the comet throwing its tail away from the Sun.

b) The tail of the comet always exists in the same orientation.

c) the comet rotates, the lighter mass of the comet is attracted by some star situated in the direction of its tail.

d) the comet rotates around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alone.