universe & solar system section 6 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26 [SSC IT 2007]

The largest planet in our solar system is

a) Saturn

b) Mercury

c) Jupiter

d) Mars

Question : 27 [SSC SIG 2006]

The light from the Sun reaches the Earth in about—

a) 10 seconds

b) 10 minutes

c) 8 minutes

d) 8 seconds

Question : 28

Isostasy is

a) the phenomenon when the earth’s crust gains weight due to mountain building or glaciation, it deforms and sinks deeper into the mantle.

b) All are correct

c) due to which crust floats on top of the mantle like ice cubes in water.

d) the property of the continental and oceanic crust, that they have the ability to rise and sink.

Question : 29

The Earth is an oblate spheroid and not a perfect sphere. This is because

1. The Earth has a rotational motion and the rotational speed increases as one goes from the poles towards the equator.
2. The equator experiences greater gravitational pull from the sun.
3. The intensity of sunlight received at the equator is greater than that at the poles.

a) Only 3

b) All of these

c) 1 and 2

d) Only 1

Question : 30 [PSC (Pre) 2019]

The tail of 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) As the Comet rotates, the lighter mass of the Comet is attracted by some stars situated in the direction of its tail

d) As the Comet rotate around the Sun, the lighter mass of Comet is pushed away due to centrifugal force alone