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Test: Our Universe- 1


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10 Questions MCQ Test Social Science for Class 3 | Test: Our Universe- 1

Test: Our Universe- 1 for Class 3 2022 is part of Social Science for Class 3 preparation. The Test: Our Universe- 1 questions and answers have been prepared according to the Class 3 exam syllabus.The Test: Our Universe- 1 MCQs are made for Class 3 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Our Universe- 1 below.
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Test: Our Universe- 1 - Question 1

What constitutes the solar system?

Detailed Solution for Test: Our Universe- 1 - Question 1

  • 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.
Test: Our Universe- 1 - Question 2

The sun attracts all the other objects in the Solar System because:

Detailed Solution for Test: Our Universe- 1 - Question 2
  • 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.
Test: Our Universe- 1 - Question 3

Which planet is no longer considered part of our solar system?

Detailed Solution for Test: Our Universe- 1 - Question 3
  • 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.

Test: Our Universe- 1 - Question 4

The nearest planet to the sun is ________

Detailed Solution for Test: Our Universe- 1 - Question 4
  • 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.
Test: Our Universe- 1 - Question 5

The heaviest planet of solar system is _______.

Detailed Solution for Test: Our Universe- 1 - Question 5

  • Jupiter is the heaviest planet of the solar system.
  • The mass of Jupiter is 1.8981×1027kg.
Test: Our Universe- 1 - Question 6

Look at the following pictures and find out the correct order of planets nearest to farthest from the Sun.
(i) Saturn

(ii) Uranus

(iii) Neptune

(iv) Venus

Detailed Solution for Test: Our Universe- 1 - Question 6

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

Test: Our Universe- 1 - Question 7

Even though sun casts its hot rays on earth, we do not feel very hot because

Detailed Solution for Test: Our Universe- 1 - Question 7
  • 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.
Test: Our Universe- 1 - Question 8

Who was the first person to walk on the moon?

Detailed Solution for Test: Our Universe- 1 - Question 8

  • 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.
Test: Our Universe- 1 - Question 9

Circle the odd one out.

Detailed Solution for Test: Our Universe- 1 - Question 9
  • Gases is the odd one out.
  • While all other three-asteroids, planets and comets are bodies in the solar system, gases are not.
Test: Our Universe- 1 - Question 10

Circle the odd one out.

Detailed Solution for Test: Our Universe- 1 - Question 10

  • Moon is the odd one out. While Venus, Mars and Saturn are planets.
  • Moon is not a planet. It is a satellite.
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