universe & solar system section 4 Practice Questions Answers Test with Solutions & More Shortcuts

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

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Question : 16

On which planet would one witness sunrise in the west ?

a) Saturn

b) Mercury

c) Venus

d) Jupiter

Discuss »

Answer: (c)

The direction of the sunrise depends upon the direction of the rotation of the earth on its axis. Any planet rotation on its axis from west to east will experience sunrise in the east and vice versa. Venus rotates on its axis from east to west and thus experiences sunrise in the west.

Question : 17 [CDS 2016-I]

Which one of the following is the reason due to which the wind in the southern hemisphere is deflected towards its left?

a) Inclined axis of the Earth

b) Rotation of the Earth

c) Temperature and pressure variations

d) Difference in the water masses of northern and southern hemisphere

Discuss »

Answer: (b)

The anticlock wise rotation of Earth deflects winds to the right in the northern hemisphere and to the left in the southern hemisphere

Question : 18

What is the time taken by the Earth to complete one rotation on its axis?

a) 24 hr

b) 24 hr 12 min 6 sec

c) 23 hr 56 min 4 sec

d) 23 hr 52 min 4 sec

Discuss »

Answer: (c)

The time taken by the Earth to complete one rotation on its axis is 23 hr-56 min 4 sec.

Question : 19

Consider the following statements:

  1. Our solar system is located in the orion arm of the Milky way galaxy, about two-third of the way out from the centre.
  2. The solar system formed from an interstellar cloud of dust and gas or nebulla about 4.6 billion years ago.
Which of the above statements is/are correct?

a) Both 1 and 2

b) Neither 1 nor 2

c) 2 only

d) 1 only

Discuss »

Answer: (a)

Our solar system is located in the Orion arm of the milky way galaxy, about two-thirds of the way out from the center. The sun is about 26,000 light-years from the center of the Milky Way Galaxy, which is about 80,000 to 120,000 light-years across (and less than 7,000 light-years thick).

We are located on one of its spiral arms, out towards the edge. It takes the sun (and our solar system) roughly 200-250 million years to orbit once around the Milky Way. In this orbit, we (and the rest of the Solar System) are traveling at a velocity of about 155 miles/sec (250 km/sec).

Question : 20

The Earth becomes minimum distance from the sun?

a) 22nd March

b) 21st September

c) 4th July

d) 3rd January

Discuss »

Answer: (d)

The Earth shows minimum distance from the Sun on 3rd January.

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