GEOGRAPHY (VI)- LESSON-1 OUR SOLAR SYSTEM (QUESTION ANSWERS)

 

GEOGRAPHY (VI)- LESSON-1

OUR SOLAR SYSTEM

(QUESTION ANSWERS)

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(NCERT QUESTION)

 

1. Answer the following questions briefly.

(a) How does a planet differ from a star?

Answer: A planet differs from a star in the following ways:

Planet	Star
1. They are celestial bodies that do not have their own light. They reflect the light from the sun.	1. They are celestial bodies that have their own light and heat.
2. They are usually smaller than the stars.	2. They are very big in size.
3. There are eight planets in our solar system.	3. There are uncountable starts in our galaxy.
Example: Earth, Mercury, Mars, etc.	Example: Sun

(b) What is meant by the ‘Solar System’?

Answer: The sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system.

(c) Name all the planets according to their distance from the sun.

Answer: Names of the planets according to their distance from the sun are:

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

(d) Why is the Earth called a unique planet?

Answer: The earth is called a unique planet due to the following reasons:

• It is probably the only planet that has conditions favourable to support life.
• It is neither too hot nor too cold. Thus, it has a suitable temperature for life.
• It has water and air, which are very essential for survival.

(e) Why do we see only one side of the moon always?

Answer: The moon moves around the earth in about 27 days and it takes exactly the same time to complete one spin on its axis. That is why we can see only one side of the moon always.

(f) What is the Universe?

Answer: The universe is a collection of all planets, stars, galaxies, celestial bodies, gases, dust clouds, light, etc. It is considered as an endless space. We all belong to this universe.

2. Tick the correct answer.

(a) The planet known as the “Earth’s Twin” is

(i) Jupiter

(ii) Saturn

(iii) Venus

Answer: (iii) Venus

(b) Which is the third nearest planet to the sun?

(i) Venus

(ii) Earth

(iii) Mercury

Answer: (ii) Earth

(c) All the planets move around the sun in a

(i) Circular path

(ii) Rectangular path

(iii) Elongated path

Answer: (i) Elongated path

(d) The Pole Star indicates the direction to the

(i) South

(ii) North

(iii) East

Answer: (ii) North

(e) Asteroids are found between the orbits of

(i) Saturn and Jupiter

(ii) Mars and Jupiter

(iii) The Earth and Mars

Answer: (ii) Mars and Jupiter

3. Fill in the blanks.

(a) A group of ________ forming various patterns is called a ________.

(b) A huge system of stars is called________.

(c) ________is the closest celestial body to our earth.

(d) ________is the third nearest planet to the sun.

(e) Planets do not have their own________ and ___________________.

Answer:

(a) A group of stars forming various patterns is called a constellation.

(b) A huge system of stars is called a galaxy.

(c) Moon is the closest celestial body to our earth.

(d) Earth is the third nearest planet to the sun.

(e) Planets do not have their own heat and light.

 

 

(OTHER IMPORTANT QUESTIONS)

Question 1. The sky filled with ------------after sunset and in the night?
(a) Bright objects
(b) Dim objects
(c) Both (a) and (b)
(d) None of these

 

Question 2. What is the name given to the full moon night?
(a) Amavasya
(b) Poornima
(c) Both (a) and (b)
(d) None of these

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Question 3. Which of the following name is given to the new moon?
(a) Poornima
(b) Amavasya
(c) Both (a) and ib)
(d) None of these

 

Question 4. What are celestial bodies?
(a) The sun
(b) The moon
(c) All the shining bodies in the sky
(d) All of these

 

Question 5. The celestial bodies which have their own heat and light are called
(a) planets
(b) stars
(c) satellites
(d) all of these

 

Question 6. Which is the most recognisable constellation?
(a) The saptarishi
(b) The moon
(c) The sun
(d) The mars

 

Question 7. The star which indicates the north is called
(a) pole star
(b) pole
(c) north pole
(d) south pole

 

Question 8. The celestial bodies which do not have their own heat and light but are lit by the light of the stars are named as
(a) stars
(b) planets
(c) both (a) and (b)
(d) none of these

 

Question 9. The word ‘planet’ has been derived from the word ‘planetai’ which is named as
(a) Latin word
(b) German word
(c) Greek word
(d) English word

 

Question 10. Which celestial bodies form the solar system?
(a) The sun
(b) The planets
(c) The satellites, asteroids and meteoroids
(d) All of the above

 

Question 11. All the planets move around the sun in fixed elliptical path, these paths are called
(a) axis
(b) orbit
(e) both (a) and (b)
(d) none of these

 

Question 12. Why is the shape of the earth geoid?
(a) It is slightly flattened at the poles
(b) It is spheroid at the poles
(c) Both (a) and (b)
(d) None of these

 

Question 13. The earth is called a unique planet due to
(a) neither too hot nor too cold
(b) presence of air and water
(c) oxygen, light supporting gas
(d) all of these

 

Question 14. The earth is called a blue planet because of the presence of
(a) water
(b) blue colour
(c) brown colour
(d) red colour

 

Question 15. Why do we see only one side of the moon from the earth?
(a) Because of moon moving around the earth in 27 days
(b) 27 days also taken in one spin
(c) Both (a) and (b)
(d) None of these

 

Question 16. Why does the moon not have conditions favourable for life?
(a) because of non existent of water
(b) because of non existent of air
(c) both (a) and (b)
(d) none of these

 

Question 17. Apart from stars, planets and satellites, there are numerous bodies which also move around the sun, what are these called?
(a) Stars
(b) Asteroids
(c) Meteoroids
(d) Planets

 

Question 18. Asteroids are found between the orbits of Jupiter and
(a) Mars
(b) Earth
(c) Venus
(d) Neptune

 

Question 19. Meteoroids are made up of
(a) dust
(b) pieces of rocks
(c) gases
(d) none of these

Question 20. What is called a cluster of millions of stars, shining white in the starry sky?
(a) Stars
(b) Planets
(c) Milky Way galaxy
(d) Satellites

 

Question 21. What makes the universe?
(a) Millions of galaxies
(b) Millions of stars
(c) Earth
(d) Satellites

 

 

 

ANSWERS.-

 1- c, 2-b ,3-b , 4-d , 5-b , 6-a ,7-a, 8-c ,9-c, 10-d, 11-b, 12-a, 13-d, 14-a, 15-c, 16-c, 17-b, 18-a, 19-b, 20-c, 21-a