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Stars and the Solar System Test - 38

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Stars and the Solar System Test - 38
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Weekly Quiz Competition
  • Question 1
    1 / -0
    We study the properties of planets, formation of galaxies, the position of stars, etc. in the field of _________.
    Solution
    The study of celestial objects and associated phenomena is called astronomy. It is the study of the properties of planets, the formation of galaxies, the position of stars, etc.
  • Question 2
    1 / -0
    Which of the following is a consequence of the fact that the rotation and revolution periods of the moon are the same?
    Solution
    We are able to see only one side of the moon everytime because the time taken by the Moon to complete one rotation around its axis and the time taken by the Moon to complete one revolution around the Earth is the same. Such situation is known as synchronous rotation.
  • Question 3
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    Phases of the moon occur because:
    Solution
    Phases of the moon occur because we can see only that part of the moon which reflects light towards us.
    The changing shape of the bright part of the Moon that we see is called its phase.     The moon is illuminated because it reflects the light from the sun. The part of the moon facing the sun is lit up. The part facing away from the sun is in darkness.
  • Question 4
    1 / -0

    The largest planet of the solar system is:
    Solution
    Jupiter is the largest planet in the solar system. It is so large that about $$1300$$ earths can be placed inside this giant planet. However, the mass of Jupiter is about 318 times that of our Earth. It rotates very rapidly on its axis.
  • Question 5
    1 / -0
    Why is the Big Bang Theory the most accepted theory for how the universe was formed?
    Solution
    Big Bang Theory is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now. It is the simplest explanation for the origin of the universe which scientists claim is still expanding.
  • Question 6
    1 / -0
    According to scientists, the gigantic explosion by which the universe came into existence is called :
    Solution
    We know that the universe consists of stars and their respective planetary systems. 
    As per the Big Bang Theory, at the beginning of the universe, there was a huge mass of matter. This mass exploded and got broken up into millions of fragments. These fragments became stars. Some parts of these stars got detached from them and cooled down to form planets.
    This is how the Universe was created. 
  • Question 7
    1 / -0
    The second biggest planet of the solar system has:
    Solution
    Second biggest planet in the solar system is Saturn. Saturn has the lowest density as it is mostly composed of gases.
  • Question 8
    1 / -0
    Saturn has specific gravity :
    Solution
    Specific Gravity of any object is defined as the ratio of its density to the density of water. 
    $$\text{Specific density} = \dfrac{ \text{ density of the object(Saturn) } }{ \text{density of water} }$$
    Where,
    $$\text{density}=\dfrac {\text{mass}}{\text{volume}}$$
    Saturn is even lighter than water. This means its density is less than that of water. Hence its specific gravity is less than that of water.
    The fascinating thing is that if Saturn falls on a large body of water, even larger than Saturn, then it will float on water.
  • Question 9
    1 / -0
    Theory which proclaims that an explosion created universe is called the
    Solution

  • Question 10
    1 / -0
    The poles of ...................... planet face the sun for longer periods of time than any other planet. 
    Solution
    The pole of $$Uranus$$ faces the Sun for a longer period of time than any other planet as its axis makes $$98°$$ and lies sideways therefore poles facing the Sun most of the time.
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