The Universe and Solar System 6th Social Science Lesson 5 Questions in English
6th Social Science Lesson 5 Questions in English
5. The Universe and Solar System
1. The study of universe is called as_____
a) Cosmology = Answer
b) Astrology
c) Astronomy
d) None
Explanation
a) Cosmology
The study of the Universe is called Cosmology. The term Cosmos is derived from the Greek word ‘Kosmos’.
2. Celestial bodies together are called_____
a) Stars
b) Galaxies
c) Solar system
d) Universe = Answer
Explanation
Numerous stars and celestial bodies came into existence by a massive explosion called Big Bang. These celestial bodies together are called The Universe. It is also referred to as the Cosmos.
3. The Big bang is said to be took place about_____ years ago
a) 15 billion = Answer
b) 10 billion
c) 25 billion
d) 5 billion
Explanation
Most astronomers believe that the Universe came into existence after the Big Bang explosion that took place about 15 billion years ago.
4. Which of the following unit is used to measure distance between celestial bodies?
a) Metre
b) Kilometre
c) Light year = Answer
d) Pascal
Explanation
The Universe is a vast expanse of space. Light year is the unit used to measure the distance between the celestial bodies.
5. Which of the following statement is correct?
1) Galaxy is a huge cluster of stars, held together by gravitational force
2) Most of the galaxies are scattered in space
a) 1 alone
b) 2 alone
c) 1, 2 = Answer
d) None
Explanation
Galaxy is a huge cluster of stars which are held together by gravitational force. Most of the galaxies are scattered in space, but some remain in groups.
6. The light year in terms of velocity/sec is_______
a) 300,0000
b) 300,000 = Answer
c) 30,000
d) 300,00000
Explanation
A Light year is the unit used to measure the distance between the celestial bodies. A light-year is the distance traversed by light in a year at a velocity of 300,000 km per second
7. The speed of sound is______ m/s
a) 330 = Answer
b) 30
c) 3330
d) 300
Explanation
A light-year is the distance traversed by light in a year at a velocity of 300,000 km per second. Sound travels at a speed of 330 m per second.
8. The milky way galaxy is formed about____ year ago
a) 5 billion = Answer
b) 5 million
c) 5 Trillion
d) 10 Billion
Explanation
Most of the galaxies are scattered in space, but some remain in groups. Milky Way Galaxy was formed about 5 billion years after the Big Bang explosion.
9. Which of the following is the nearest galaxy to Earth?
a) Milky way
b) Andromeda = Answer
c) Cosmomeda
d) None
Explanation
Our solar system is a part of the Milky Way galaxy. Andromeda galaxy is the nearest to the Earth apart from the ‘Magellanic Clouds’ galaxy.
10. The solar system is believed to have formed about_____ years ago
a) 4.5 billion = Answer
b) 5 billion
c) 4 billion
d) 3.5 billion
Explanation
The word ‘solar’ is derived from the Roman word ‘sol’, which means ‘Sun God’. The solar system is believed to have formed about 4.5 billion years ago.