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

Question : 1

Oxygen built up in the Earth’s atmosphere because:

a) algae and other organisms employed photosynthesis.

b) oxygen settled on Earth from planets further from the sun.

c) rocks weathered and released their oxygen.

d) the ocean separated from the crust.

Answer: (a)

Earth’s early atmosphere contained only small amounts of free oxygen, probably produced entirely by the reaction of sunlight with water vapor from volcanoes. The oxygen-rich atmosphere that evolved later, and upon which oxygen-breathing life now depends, was a result of the origin of photosynthesis.

During the Precambrian, vast numbers of single-celled algae and cyanobacteria living in the seas eventually released enough oxygen to transform the environment.

Question : 2 [SSC SO 2006]

Which of the following statements is correct?

a) Pluto has been given the number 134340

b) All of the above

c) Pluto was discoverd by Clyde Tombaugh in 1930

d) Pluto is not a Planet now

Answer: (b)

Pluto was discovered by Clyde Tombaugh in 1930. According to International Astronomical Union (IAU) on August 24, 2006, Pluto is considered a dwarf planet. According to the definition, there are currently eight planets and five dwarf planets known in the solar system.

The five dwarf planets are Pluto, Ceres, Eris, Make make and Haumea. Pluto has been given number 134340.

Question : 3 [SSC CML (PRE) 2000]

Which planet is called the evening star?

a) Venus

b) Jupiter

c) Mercury

d) Mars

Answer: (a)

Venus 'overtakes' the Earth every 584 days as it orbits the Sun.

As it does so, it changes from the 'Evening Star', visible after sunset, to the 'Morning Star', visible before sunrise.

Question : 4

Are the orbits of the planets on the same plane?

  1. Yes, more or less
  2. No, they’re all over the place.
  3. Only first four planets are on the same plane.
Choose the correct code from the above statements:

a) 2 only

b) None of these

c) 1 and 3 only

d) 1 only

Answer: (d)

Yes, the planets orbit in or close to a plane around the sun called the ecliptic.

The ecliptic is inclined 7 degrees from the planet of the Sun’s equator.

Question : 5

List I List II
(Volcano) (Country)
A. Semeru 1. Indonesia
B. Cotopaxi 2. Ecuador
C. Etna 3. Italy
D. Kilimanjaro 4. Kenya
  5. India
Codes: A B C D

a) A - 1; B - 4; C - 3; D - 2

b) A - 3; B - 2; C - 5; D - 4

c) A - 3; B - 4; C - 5; D - 2

d) A - 1; B - 2; C - 3; D - 4

Answer: (d)

A. Semeru Volcano is situated in Indonesia.

B. Cotopaxi Volcano is situated in Ecuador.

C. Etna Volcano is situated in Italy.

D. Kilimanjaro Volcano is situated in Kenya.

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964 Universe, solar system and Astronomy based indian geography mcq section 9 question answer with explanation pdf

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