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

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The following question based on Universe, solar system and Astronomy topic of indian geography mcq

Questions : ‘Super nova’ is

(a) an exploding Star

(b) a black hole

(c) an asteroid

(d) a comet

The correct answers to the above question in:

Answer: (a)

A supernova is a stellar explosion that is more energetic than a nova. During this short interval, a supernova can radiate as much energy as the Sun is expected to emit over its entire life span.

The explosion expels much or all of a star's material at a velocity of up to 30,000 km/s (10% of the speed of light).

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Question : 1

On which date is the earth in perihelion ?

a) January 3

b) July 4

c) Dec 22

d) June 21

Answer: (a)

The Earth is closest to the Sun or at the perihelion on January 3, when it is winter in the Northern Hemisphere.

Question : 2

The planet emitting green light is

a) Uranus

b) Neptune

c) Venus

d) Jupiter

Answer: (a)

The atmosphere of Uranus is composed of 83% hydrogen, 15% helium, 2% methane and small amounts of acetylene and other hydrocarbons. Methane in the upper atmosphere absorbs red light, giving Uranus its blue-green colour.

Question : 3

The inexhaustible source of energy of the stars is due to

a) decay of radioactive elements

b) excess of oxygen that helps burning and release of energy

c) conversion of helium to hydrogen

d) conversion of hydrogen to helium

Answer: (d)

A star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star’s interior and then radiates into outer space.

Question : 4

The coriollis effect is produced by

a) earth’s rotation

b) earth’s rotation and revolution

c) earth’s revolution

d) pressure gradient

Answer: (a)

The Coriollis effect is the apparent deflection of global winds, ocean currents that moves freely across the Earth’s surface. The deflection is due to the rotation of the Earth on its axis.

Question : 5

Consider the following statements:

  1. The Earth is nearest to the Sun on about January 3.
  2. Earth is farthest from the Sun on about July
Which of the above statements is/are correct?

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only

Answer: (a)

The earth is nearest to the sun on about January 3rd. Earth is farthest from the sun on about 4th July.

Question : 6

When any object is taken from the Earth to the Moon

a) There is no change in its weight

b) It becomes totally weightless

c) Its weight decreases

d) Its weight increases

Answer: (c)

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