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

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

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Question : 16 [CDS 2016-I]

Which of the following statements is / are correct ?

  1. The earth is nearest to the sun at Perihelion, which generally occurs on January 3
  2. The earth is farthest away from the Sun at Perihelion, which generally occurs on July 4
  3. The earth is farthest away from the Sun at Aphelion, which generally occurs on July 4
  4. The earth is nearest to the Sun at Aphelion, which generally occurs on January 3
Select the correct answer using the code given below :

a) 1 and 3

b) 1 and 2

c) 2 and 4

d) 1 only

Discuss »

Answer: (a)

The Earth is closest to the Sun or at its Perihelion- about two weeks after the December solstice, i.e. 3 January and farthest from the Sun or at its Aphelion, about two weeks after the June solstice, i.e., 4 July.

Question : 17

What are the two most abundant elements in nebula (gas clouds) in the universe?

  1. Nitrogen
  2. Hydrogen
  3. Helium
  4. Oxygen
  5. Silicon
Select the correct answer using the codes given below:

a) 2 and 3

b) 2 and 4

c) 3, 4 and 5

d) 1, 2 and 3

Discuss »

Answer: (a)

The galaxy has within it many clouds of gas and dust – often associated with a nebula created from a supernova explosion.

These clouds are mostly made of the elements hydrogen and helium, as these are the most common elements in the universe.

Question : 18 [SSC IT 2006]

Brightest planet in our solar system is

a) Mars

b) Jupiter

c) Mercury

d) Venus

Discuss »

Answer: (d)

Venus has the highest albedo of any planet in our solar system. Venus is so bright partly because it reflects over 70 percent of the sunlight striking it.

It owes its reflective ability to the fact that it’s blanketed with clouds. Sunlight bouncing from these clouds is what makes Venus so bright.

Question : 19

Among the following which planet takes maximum time for one revolution around the sun?

a) Mars

b) Venus

c) Jupiter

d) Earth

Discuss »

Answer: (c)

Jupiter takes maximum time for one revolution around the sun.

Jupiter revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days.

Jupiter travels at an average speed of 29,236 miles.

Question : 20 [MPPCS (Pre) 2014]

Size of the Sun is how many times bigger than that of the Earth?

a) 109 times

b) 115 times

c) 100 times

d) 124 times

Discuss »

Answer: (a)

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