universe & solar system section 12 Practice Questions Answers Test with Solutions & More Shortcuts

Universe, solar system and Astronomy PRACTICE TEST [13 - EXERCISES]

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Question : 11 [PSC (Pre) 2019]

The possibility of desert on Earth is more

a) Nearby 50º latitude

b) Nearby 70º latitude

c) Nearby 23º latitude

d) Nearby 0º latitude

Discuss »

Answer: (c)

Question : 12 [UP (Mains) 2015]

‘Super Nova’ is

a) A comet

b) A dyning star

c) A black hole

d) An asteroid

Discuss »

Answer: (b)

Question : 13

Which one of the following planets is the brightest?

a) Venus

b) Jupiter

c) Mercury

d) Mars

Discuss »

Answer: (a)

Question : 14

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.

Discuss »

Answer: (d)

Because of the comet rotation around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alone. When a comet comes close enough to the sun, the ice begins to melt at such a great pace that sublimation occurs.

The sublimation of the ice that carries away dirt and rock causes the appearance of a large white fireball with a long tail. The layer that envelopes the comet is called the coma. A tail of dust particles, hydrogen, or ions extends more than a million miles away from the comet.

Question : 15 [UPPCS (Mains) 2004]

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

Discuss »

Answer: (c)

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