universe & solar system section 6 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements

1. The Earth does not move along its orbit at a constant rate.
2. The Earth moves fastest at perihelion and slowest at aphelion.

a) Ohm’s law

b) Newton’s law of gravitation

c) Newton’s second law of motion

d) Kepler’s second law

Question : 2

Which one of the following statements is correct with reference to our solar system?

a) The Sun contains 75 percent of the mass of the solar system.

b) The diameter of the sun is 190 times that of the Earth.

c) The predominant element in the composition of Earth is silicon.

d) The earth is the densest of all the planets in our solar system.

Question : 3

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?

1. Detection of microwaves in space.
2. Observation of redshift phenomenon in space.
3. Movement of asteroids in space.
4. Occurrence of supernova explosions in space.

a) 1, 3 and 4

b) None of the above can be cited as evidence

c) 2 only

d) 1 and 2

Question : 4

Solar eclipse occurs on

a) Any day

b) Full Moon day (Poornima)

c) New Moon day

d) Quarter Moon day

Question : 5

The asteroids revolve round the Sun in between :

a) Jupiter and Saturn

b) Saturn and Uranus

c) Mars and Jupiter

d) Earth and Mars

Question : 6

The Earth is divided into time zones for the purpose of

a) both are correct

b) both are incorrect

c) maintaining same time

d) maintaining a standard time system