universe & solar system section 5 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 31 [MPPCS (Pre) 1990]

Earth’s axis is tilted at an angle of

a) 33½ º

b) 42½ º

c) 66½ º

d) 23½ º

Answer: (d)

Question : 32

The surface temperature of sun is nearly

a) 6000 K

b) 8000 K

c) 4000 K

d) 2000 K

Answer: (a)

Question : 33

The planet whose period of rotation is longer than the period of revolution around the sun is

a) Venus

b) Neptune

c) Mars

d) Mercury

Answer: (a)

Venus is a planet whose period of rotation is longer than the period of revolution around the sun. The period of rotation for Venus is 243 days.

In other words, Venus takes 243 days to turn once on its axis so that the stars are in the same position in the sky.

Question : 34 [BPSC (Pre) 1995]

Time taken by the Sun to revolve around the centre of our galaxy is

a) 25 crore years

b) 50 crore years

c) 10 crore years

d) 2.5 crore years

Answer: (a)

Question : 35

Choose the correct statement(s)?

  1. The movement of interior plates of earth causes change in surface of earth.
  2. Sea waves comes under exogenic force.
  3. Sudden movement of interior of earth causes earthquakes.

a) 1 and 3

b) All are true

c) 1 and 2

d) Only 1

Answer: (b)

The interior structure of the Earth is layered in spherical shells, like an onion. These layers can be defined by their chemical and their rheological properties.

Earth has an outer silicate solid crust, a highly viscous mantle, a liquid outer core that is much less viscous than the mantle, and a solid inner core. Sudden movements of the interior of the earth cause earthquakes.

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