universe & solar system section 9 Practice Questions Answers Test with Solutions & More Shortcuts

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

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Question : 6 [UPPCS (Pre) 1992]

The number of planet in solar system is

a) 12

b) 21

c) 8

d) 7

Discuss »

Answer: (c)

Question : 7

The energy of sun is produced by

a) Nuclear fusion

b) Oxidation

c) Ionisation

d) Nuclear fission

Discuss »

Answer: (a)

Question : 8

Match the planets with their properties and accordingly select the correct alternative: 

List I List II
(Planet) (Property)
A. Saturn 1. Longest year
B. Neptune 2. 71% water
C. Earth 3. Longest day
D. Venus 4. Having most moons
Codes: A B C D

a) A – ii, B – iv, C – i, D - iii

b) A – iv, B – iii, C – ii, D - i

c) A – iii, B – ii, C – iv, D - i

d) A – iv, B – i, C – ii, D - iii

Discuss »

Answer: (d)

As the furthest orbiting planet in the Solar System,

  • Neptune has the longest year, taking 164.8 Earth years to complete a single orbit of the Sun.
  • Saturn has the most moons i.e. 62.
  • Earth has 71% water.
  • Venus has the longest day of any planet in our solar system. It completes one rotation every 243 Earth days. Its day lasts longer than its orbit. It orbits the Sun every 224.65 Earth days, so a day is nearly 20 Earth days longer than its year.

Question : 9

Which of the following factors influence ocean currents?

  1. Rotation of the Earth
  2. Air pressure and wind
  3. Ocean water density
  4. Revolution of the Earth
Select the correct answer using the codes given below

a) 1 and 4

b) 2, 3 and 4

c) 1, 2 and 3

d) 1 and 2

Discuss »

Answer: (c)

A ocean current is a continuous, directed movement of ocean water generated by the forces acting upon this mean flow, such as breaking waves, wind, coriolis effect, cabbeling, temperature and salinity differences and tides caused by the gravitational pull of the Moon and the Sun.

Question : 10 [BPSC (Pre) 2000]

For one revolution around the Sun, Uranus takes

a) 18 years

b) 48 years

c) 36 years

d) 84 years

Discuss »

Answer: (d)

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