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1
Which of the following statements are true?
i. Planets do not have their own heat and light
ii. Solar system consists of only planets
iii. Distance between sun and earth is 150 million Km
A. Only i and ii
B. Only i and iii
C. Only ii and iii
D. All of the above
Answer - B
Solution
Points to Know-
• Celestial bodies which have their own heat and light are known as stars. (Sun is a star)
• Some celestial bodies do not have their own heat and light. These are light up by stars. These bodies are called planets.
• Solar system consists of sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids.
• Distance between sun and earth is 150 million Km.
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2
Ursa Major is an example of
A. Asteroid
B. Star
C. Constellation
D. Satellite
Answer - C
Solution
Points to Know-
Saptarishi is a group of seven stars that forms a part of Ursa Major or Big Bear Constellation
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3
Which of the following option is true?
i. North Star always remain in the same position in the sky
ii. Stars do not have their own heat and light
A. Only i
B. Only ii
C. Both i and ii
D. None of the above
Answer - A
Solution
Points to Know-
• Celestial bodies which have their own heat and light are known as stars and celestial bodies which do not have their own heat and light and are light up by stars, called planets.
• North star indicates the north direction and is also called the Pole Star
• It always remains in the same position in the sky. So can locate the position of the Pole Star with the help of the Saptarishi.
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4
What is Akash Ganga?
A. Constellation
B. Star
C. Satellite
D. Galaxy
Answer - D
Solution
Points to Know-
• Galaxy is system of billions of stars, clouds of dust and gases.
• Milky Way (AKASH GANGA) is galaxy of earth.
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5
Which force binds the solar system?
A. Gravitational force of earth
B. Pulling force of sun
C. Electromagnetic force of stars
D. Magnetic force
Answer - B
Solution
Points to Know-
• Solar System consists of sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids.
• Centre of the solar system is Sun. Its pulling force binds the solar system
• Sun is ultimate source of heat and light for the solar system
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6
Which planet is considered as Earth’s twin?
A. Mercury
B. Venus
C. Mars
D. Jupiter
Answer - B
Solution
Points to Know-
Venus is considered as ‘Earth’s-twin’ because of similarity in its size and shape to that of the earth
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7
Which of the following is the largest satellite of the solar system?
A. Ganymide
B. Titan
C. Callisto
D. Moon
Answer - A
Solution
Points to Know-
Jupiter is the largest planet of solar system and its satellite, Ganymide, is the largest satellite in solar system
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8
Which of the following option is true?
i. Shape of the Earth is perfect sphere
ii. Mas is known as red planet
iii. Moon moves around the earth in about 27 days
A. Only i and ii
B. Only i and iii
C. Only ii and iii
D. All of the above
Answer - C
Solution
Points to Know-
• Shape of the earth is not spherical
• Earth is slightly flattened on the poles and has a bulge in the middle, that is why its shape is described as Geoid
• Mars is known as red planet because of its reddish appearance as seen from Earth. It is due to Iron oxide
• Moon is a satellite which moves around Earth in about 27 days
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9
Among the following planets which one are considered as outer planets?
A. Earth, Mars, Saturn
B. Mars, Jupiter, Venus
C. Jupiter, Saturn, Neptune
D. Mercury, Uranus, Venus
Answer - C
Solution
Points to Know-
• Inner planets – very close to the sun. They are made up of rocks. Mercury, Venus, Earth and Mars
• Outer Planets – Very-very far from the sun and are huge planets made up of gases and liquids Jupiter, Saturn, Uranus, Neptune
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10
The planets move around the sun in a
A. Circular path
B. Elongated path
C. Rectangular path
D. None of the above
Answer - B
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