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

Question : 1

Cycle of sun spots is

a) 11 years

b) 12 years

c) 10 years

d) 9 years

Answer: (a)

The number of sunspots observed on the surface of the sun varies from year to year in a cyclical way. The length of the cycle is around 11 years on average.

Question : 2

The Earth is an oblate spheroid and not a perfect sphere. This is because

  1. The Earth has a rotational motion and the rotational speed increases as one goes from the poles towards the equator.
  2. The equator experiences greater gravitational pull from the sun.
  3. The intensity of sunlight received at the equator is greater than that at the poles.
Select the correct answer using the codes given below

a) Only 3

b) All of these

c) 1 and 2

d) Only 1

Answer: (d)

The shape of the Earth is very close to that of an oblate spheroid, a sphere flattened along the axis from pole to pole such that there is a bulge around the equator.

This bulge results from the rotation of the Earth and causes the diameter at the equator to be 43 km large than the pole to pole diameter.

Question : 3

When it is 12 Noon at Allahabad, the time at Wellington (New Zealand) would be close to which one of the following?

a) 6:30 pm of the same day

b) 6:30 pm of the previous day

c) 4:30 pm of the previous day

d) 4:30 pm of the same day

Answer: (a)

Question : 4

Space between Earth and Moon is known as

a) Nebula

b) None of these

c) Fulalunar

d) Cislunar

Answer: (d)

Space between Earth and Moon is known as Cislunar. Pertaining to the space between the earth and the orbit of the moon.

Question : 5 [NDA 2014-I]

Which of the following is/are direct source(s) of information about the interior of the Earth?

  1. Earthquake wave
  2. Volcano
  3. Gravitational force
  4. Earth magnetism
Select the correct answer using the codes given below

a) 3 and 4

b) All of these

c) Only 2

d) 1 and 2

Answer: (d)

Earthquake waves are propagating vibrations that carry energy from the source of the shaking outward in all directions.

It is of four types: P (for primary) S (for secondary) Love Rayleigh A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur.

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