The Universe and Solar System 6th Social Science Lesson 5 Questions in English
11. Which of the following are parts of our solar system?
a) dwarf planets
b) comets
c) eight planets
d) all the above = Answer
Explanation
The solar system is a gravitationally bound system which comprises of the Sun, the eight planets, dwarf planets, satellites, comets, asteroids and meteoroids.
12. Which of the following statement is incorrect?
1) The Sun is at the centre of the solar system.
2) Each member of the solar system revolves around the Sun.
a) 1 alone
b) 2 alone
c) 1, 2
d) None = Answer
Explanation
The Sun is at the centre of the solar system. Each member of the solar system revolves around the Sun.
13. The percentage of sun in total mass of solar system is_____ %
a) 50
b) 99.8 = Answer
c) 89.8
d) 75
Explanation
The Sun is a huge star. Sun is so huge that it accounts for 99.8 percent of the entire mass of the solar system.
14. How much time it takes for sunlight to reach earth?
a) 8.3 minutes = Answer
b) 8.3 seconds
c) 7.3 minutes
d) 7.3 seconds
Explanation
The Sun is the source of light and heat energy to the entire solar system. Sunlight takes about 8.3 minutes to reach the Earth.
15. Which of the following statement is correct?
1) The Sun is made up of extremely hot gases like Hydrogen and Helium.
2) The surface temperature of the Sun is about 6,000° C.
a) 1 alone
b) 2 alone
c) 1, 2 = Answer
d) None
Explanation
The Sun is made up of extremely hot gases like Hydrogen and Helium. The surface temperature of the Sun is about 6,000° C.
16. Which of the following statement is incorrect?
1) 4.3 million Earths fit inside the Sun.
2) The Sun is self-luminous so it gives light on its own
a) 1 alone = Answer
b) 2 alone
c) 1, 2
d) None
Explanation
The Sun is a star. It is self-luminous so it gives light on its own. 1.3 million Earths fit inside the Sun.
17. The word planet means_______
a) Sphere
b) Revolving
c) Wanderer = Answer
d) None
Explanation
The word planet means wanderer. There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
18. Which of the of the following planet rotate anti-clockwise?
a) Venus
b) Uranus
c) Neptune = Answer
d) Both a and b
Explanation
All the planets rotate anti-clockwise (from west to east) on their own axes except Venus and Uranus. Hence remaining Neptune
19. Which of the following statement is correct?
1) The elliptical path in which the planets move around the Sun is known as orbit
2) The eight planets revolve in their respective orbits because of the gravitational pull
a) 1 alone
b) 2 alone
c) 1, 2 = Answer
d) None
Explanation
The elliptical path in which the planets move around the Sun is known as orbit. The eight planets revolve in their respective orbits because of the gravitational pull of the Sun. They do not move out of their paths or away from the solar system.
20. Which of the following is not a Terrestrial Planet?
a) Mercury
b) Earth
c) Mars
d) Neptune = Answer
Explanation
The four planets nearer to the Sun are called Inner or Terrestrial Planets (Mercury, Venus, Earth and Mars).