The Universe and Solar System 6th Social Science Lesson 5 Questions in English
61. Which of the following are called as minor planets?
a) Asteroids = Answer
b) Comets
c) Dwarf planets
d) Natural satellites
Explanation
Asteroids are small solid objects that move around the Sun. They are found as a belt between Mars and Jupiter. They are too small to be called as planets. They are also known as Planetoids or Minor Planets.
62. Which of the following celestial body has head and tail?
a) Comets = Answer
b) Asteroids
c) Meteorites
d) Meteors
Explanation
A comet is a celestial object made up of a head and a tail. The head of a comet consists of solid particles held together by ice and the tail is made of gases.
63. Halley’s Comet will appear next in_____
a) 2021
b) 2061 = Answer
c) 2031
d) 2025
Explanation
Halley’s Comet is the most famous comet which comes close to the Earth every 76 years. It last appeared in 1986 and will next appear in 2061.
64. Which of the following is called as shooting stars?
a) Meteors = Answer
b) Comets
c) Asteroids
d) None
Explanation
A meteor is a stone like or metallic body. As they often appear as streaks of light in the sky, they are also known as Shooting Stars.
65. Which of the following statement is correct?
1) Meteorites which strike the Earth’s surface are called meteors
2) When entering into the Earth’s atmosphere, most of meteors burn
a) 1 alone
b) 2 alone = Answer
c) 1, 2
d) None
Explanation
A meteor is a stone like or metallic body. When entering into the Earth’s atmosphere, most of them burn. Meteors which strike the Earth’s surface are called meteorites.
66. The Earth’s axis is always tilted or inclined from the vertical by an angle of______
a) 23½° = Answer
b) 66½°
c) 33½°
d) 36½°
Explanation
The Earth’s axis is always tilted or inclined from the vertical by an angle of 23½°. It makes an angle of 66½° with the plane of the Earth’s orbit.
67. The velocity of the Earth’s rotation at 60° N and S latitudes?
a) 1670 Kmph
b) 845 Kmph = Answer
c) 945 kmph
d) 1045 kmph
Explanation
The velocity of the Earth’s rotation varies from 1670 km per hour at the equator to 845 km per hour at 60° N and S latitudes and zero at the poles.
68. Which of the following statement is correct?
1) The Earth rotates from west to east (anticlockwise) and takes 23 hours 56 minutes and 4.09 seconds to complete one rotation.
2) The time taken by the Earth to complete one rotation is called a day.
a) 1 alone
b) 2 alone
c) 1, 2 = Answer
d) None
Explanation
Rotation is the spinning movement of the Earth on its axis. The Earth rotates from west to east (anticlockwise) and takes 23 hours 56 minutes and 4.09 seconds to complete one rotation. The time taken by the Earth to complete one rotation is called a day.
69. The Midnight Sun is a natural phenomenon that occurs in_____
a) north of the Arctic Circle
b) south of the Antarctic Circle
c) Greenwich
d) Both a and b = Answer
Explanation
The Midnight Sun is a natural phenomenon that occurs in the summer months in places north of the Arctic Circle or south of the Antarctic Circle, when the Sun remains overhead 24 hours a day.
70. Which of the following statement is correct?
1) The illuminated portion of the Earth experiences day
2) The line which divides the surface of the Earth into a lighted half and a dark half is called the Terminator Line.
a) 1 alone
b) 2 alone
c) 1, 2 = Answer
d) None
Explanation
The illuminated portion of the Earth experiences day, whereas the darkened part of the Earth experiences night. The line which divides the surface of the Earth into a lighted half and a dark half is called the Terminator Line.