Universe And Solar System (World Geography) (Part-3)

Total Questions: 23

11. Which among the following is false about earth? [S.S.C. Online CHSL (T-I) 11.01.2017 (Shift-III)]

Correct Answer: (c) It is also known as red planet.
Solution:

Earth is the fifth largest planet after Jupiter, Saturn, Uranus and Neptune. Earth is the third planet in terms of distance from the Sun after Mercury and Venus. Earth is the densest planet. Mars is called the 'Red Planet', while Earth is called the 'Green Planet'.

12. Evidence suggests that life on Earth has existed for about ________. [S.S.C. Online CHSL (T-I) 7.01.2017 (Shift-III)]

Correct Answer: (d) 3.5 billion years
Solution:

The first fossil evidence of life on Earth dates back to the early Archaean era (about 3.5 billion years ago). Therefore, life on Earth has existed for about 3.5 billion years.

13. _____ is the thinnest layer of the earth. [C.P.O. S.I. 6.06.2016 (Shift-I)]

Correct Answer: (c) crust
Solution:

The internal structure of the Earth is divided into three parts – crust, mantle and core. The outermost layer is the crust, which is 0-30 km thick. It is the thinnest layer of the earth.

14. Who discovered Pluto? [S.S.C. Online CHSL (T-I) 22.01.2017 (Shift-I)]

Correct Answer: (d) Clyde Tombaugh
Solution:

When Clyde Tombaugh built his first telescope at the age of 20, he could not have known it was setting him forward on a path that would eventually lead to the discovery of the first known dwarf planet, Pluto.

15. “Sirius”, the brightest star outside solar system, is also called ______. [S.S.C. Online CHSL (T-I) 15.01.2017 (Shift-II)]

Correct Answer: (b) Dog star
Solution:

A bright star called 'Sirius' outside the solar system is called a dog star. It is 8.6 light years away from Earth.

16. The constellation ‘Sapta Rishi’ is known to Westerners as the— [S.S.C. Online C.G.L.(T-I) 3.09.2016 (Shift-I)]

Correct Answer: (c) Big Dipper
Solution:

A circle or group of seven stars is seen in the sky, called 'Saptrishi Mandal'. The names of the stars in the above constellation have been based on of the great saints of India. The residents of the West know this Saptarishi Mandal as the Big Dipper.

17. What is the study of moon called? [S.S.C. Online CHSL (T-I) 15.01.2017 (Shift-I)]

Correct Answer: (a) Selenology 
Solution:

The study of the moon is called 'selenology'. The average distance of the Moon from the Earth is 384400 km. The minimum distance of the Moon from Earth is 363300 km, while the maximum distance is 405500 km. The force of gravity on the Moon is equal to 1/6 of the gravitational force on the Earth.

18. If a star is bigger than sun, but not more than twice as big, it will turn into a _______. [S.S.C. Online CHSL (T-I) 15.01.2017 (Shift-III)]

Correct Answer: (a) Pulsar 
Solution:

If a star is bigger than the Sun, but not twice as big, it turns into a pulsar. Stars heavier than 1.4 solar masses and less than 4 solar masses are converted into neutron stars. Pulsars are a subclass of neutron stars.

19. Name the region which is beyond the orbit of Neptune? It consists of many comets, asteroids and other small particles composed of large amounts of ice. [C.P.O. S.I. 7.06.2016 (Shift-I)]

Correct Answer: (a) Kuiper Belt
Solution:

The Kuiper Belt is beyond the orbit of Neptune. It consists of many comets, asteroids and other small particles composed of large amounts of ice.

20. The large collection of stars, dust and gas held together by gravitational attraction between components is known as— [S.S.C. Online C.G.L.(T-I) 7.09.2016 (Shift-III)]

Correct Answer: (c) Galaxy 
Solution:

The term galaxy refers to a large collection of stars, dust, and gas clouds held together by gravitational attraction. The smallest galaxies may contain only a few hundred thousand stars, while the most giant galaxies have thousands of billions of stars. The Milky Way galaxy contains our solar system.