The Universe and Solar System Book Back Questions 6th Social Science Lesson 5
6th Social Science Lesson 5
5] The Universe and Solar System
Book Back Questions with Answer and Do You Know Box Content
Do You Know?
The study of the Universe is called Cosmology. The term Cosmos is derived from the Greek word ‘Kosmos’.
A light-year is the distance travelled by light in a year. Light travels at a velocity of 300,000 km per second. Sound travels at a speed of 330 m per second.
1.3 million Earths can fit inside the Sun. imagine how big the Sun is.
The distance between the Sun and the Earth is about 150 million kilometre. A flight flying at a speed of 800 km per hour from the Earth would take 21 years to reach the Sun.
On 24th September, 2014 Mangalyaan (Mars Orbiter Mission – MOM) , launched by the Indian Space Research Organization (ISRO) , reached the orbit of Mars to analyze its atmosphere and topography. ISRO has now become the fourth space agency to reach Mars after the Soviet Space programme, NASA and the European Space Agency.
ISRO launched India’s first ever Moon mission, Chandrayaan – 1 in 2008.
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.
The velocity of the Earth’s rotation varies from 1,670 km per hour at the equator to 845 km per hour at 60o N and S latitudes and zero at the poles.
Perihelion is the Earth’s closet position to the Sun. aphelion is the farthest position of the Earth from the Sun.
The Gulf of Mannar Biosphere Reserve in the Indian Ocean covers an area on 10,500 sq.km in the ocean.
Fill in the blanks:
1. The Universe was formed after _______________ explosion.
2. ______________ is the unit used to measure the distance between two celestial bodies.
3. _______________ is the centre of the solar system.
4. The word planet means ___________.
5. _____________ planet has many natural satellites.
6. India’s first ever mission to the moon is _______________.
7. Earth is inclined by _____________ degrees.
8. The Equator faces the Sun directly on ___________ and ___________.
9. At the time of Perihelion, the Earth is _______________ to the Sun.
10. The line which divides day and night on the Earth’s surface is ____________.
Choose the best answer:
1. The movement of the Earth on its axis is called
(a) Revolution
(b) Seasons
(c) Rotation
(d) Circulation
2. The Tropic of Capricorn faces the Sun directly on
(a) March 21
(b) June 21
(c) September 23
(d) December 22
3. The galaxy in which our solar system is found is
(a) Andromeda
(b) Megallanic clouds
(c) Milky Way
(d) Starburst
4. The only celestial body where man has successfully landed
(a) Mars
(b) Moon
(c) Mercury
(d) Venus
5. Which of the following planets can float on water?
(a) Jupiter
(b) Saturn
(c) Uranus
(d) Neptune
Circle the odd one out:
1. Venus, Jupiter, Neptune, Saturn
2. Sirius, Andromeda, Milky Way, Megallanic clouds
3. Pluto, Eris, Ceres, Io
4. Comet, Asteroids, Meteorites, Dwarf planets
5. Rover, Orbiter, Aeroplane, Space shuttle
Match the following:
1. Hottest Planet – Mars
2. Ringed Planet – Neptune
3. Red Planet – Venus
4. Somersaulting Planet – Saturn
5. Coldest Planet – Uranus
i) Consider the following statements:
1. Venus rotates from east to west.
2. The Tropic of Cancer faces the Sun on June 21.
3. Mars has rings around it.
Choose the correct answer using the codes given below:
(a) 1 and 2
(b) 2 and 3
(c) 1, 2 and 3
(d) 2 only
ii) Which of the statement(s) is/are true?
Statement I: Earth is called a watery planet.
Statement II: The rotation of the Earth causes seasons.
(a) I is true, II is wrong
(b) I is wrong, II is true
(c) Both the statements are true
(d) Statements I and II are wrong
Name the following:
1. Cluster of stars.
2. The nearest galaxy to the solar system.
3. The brightest planet.
4. The living sphere.
5. The year which has 366 days.
Answers:
Fill in the blanks:
1. Big Bang 2. Light Year 3. Sun 4. Wanderer 5. Jupiter 6. hanrayaan I 7. 23 1/2
8. 21st March and 23rd September 9. closest 10. Terminator Line
Choose the best answer:
1. Rotation 2. December 22 3. Milky Way 4. Moon 5. Saturn
Circle the odd one out:
1. Venus 2. Sirius 3. Io 4. Dwarf planets 5. Aeroplane
Match the following:
1. Venus 2. Saturn 3. Mars 4. Uranus 5. Neptune
i) Consider the following statements:
Statement 1 and 2 is True
ii) Which of the statement(s) is/are true?
Statement I is true, II is wrong
Name the following:
1. Galaxy 2. Megallanic clouds / Andromeda 3. Venus 4. Earth 5. Leap year