Test: Our Universe- 1 - Class 3 MCQ

• The Solar System is made up of the Sun, planets, moons, comets, asteroids, minor planets, and dust and gas.
• There are eight planets in our solar system.
• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

• The Sun is so large, and has powerful gravity which attracts all other objects in the solar system.
• It is at the center of the universe but its size and gravity is responsible for attracting other objects, rather than its location.
• Sun does not have any magnetic pull and neither do planets exert magnetic pull on sun.

• Pluto is no longer the part of our solar system.
• Earlier, nine planets were considered part of the solar system but after recent scientific discoveries, Pluto has been excluded from this group.
• Jupiter, Uranus and Neptune are still considered as planets.

Therefore, option c is the correct answer.

• Mercury is the nearest planet to the sun.
• Jupiter is the fifth planet from the sun and Earth is the third planet from the sun.

• Jupiter is the heaviest planet of the solar system.
• The mass of Jupiter is 1.8981×10²⁷kg.

The right order of planets from the sun is Venus, Saturn, Uranus, and Neptune.

• Atmosphere on earth reflects back sun's light.
• Thus, earth does not absorb harmful sun rays or UV rays emitted by sun.
• Therefore, temperature on earth remains bearable, unlike other planets.

• Neil Armstrong was the first person to walk on the moon.
• Kalpana Chawla was an Indian astronaut but she was not the first person to walk on the surface of the moon.
• APJ Abdul Kalam was the President of India and was responsible for the launch of many missiles and spaceships but he was not the first person to go to moon.
• Galileo made discoveries related to solar system.

• Gases is the odd one out.
• While all other three-asteroids, planets and comets are bodies in the solar system, gases are not.