universe & solar system section 8 MCQ Questions & Answers Detailed Explanation

Question : 1

The permanent tilt of the earth’s axis and the revolution of the earth in its orbit together cause

1. deflection of winds and ocean currents.
2. differences in time between places on different meridians.
3. varying lengths of day and night at different times of the year.
4. changes in the altitude of the mid-day sun at different times of the year.

a) 3 and 4

b) 1, 2 and 3

c) 1 and 4

d) 2, 3 and 4

Question : 2

The sun is veritical over the Tropic of Cancer on

a) Sept. 23

b) Dec. 22

c) June 21

d) March 21

Question : 3

What is most important about the Arctic and the Antarctic circles ?

a) Both areas frozen continents

b) Both regions are uninhabited

c) The days and nights are never more than 24 hours long here

d) Within these circle only can the days and nights be longer than 24 hours

Question : 4

About 95 per cent of active volcanoes occur at the

1. plate subduction zones
2. transform faults
3. island arcs
4. mid-oceanic ridges.

a) 1 and 4

b) All of the above

c) 1 only

d) 1 and 2

Question : 5

The sidereal month may be defined as

a) the period of rotation of moon

b) None of these

c) the period in which the moon completes an orbit around the Earth and returns to the same position in the sky.

d) the period in which the moon completes an orbit around the Earth.

Question : 6

Which of the following stars is known as Fossil star?

a) Red Giant

b) White Dwarf

c) Dog Star

d) Protostar