Tag: physics

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Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system

Match items in column A with one or more items in column B 

Column A Column B
(i) Inner planet  (a) Saturn 
(ii) Outer planet  (b) Pole star 
(iii) Constellation (c) Great Bear
(iv) Satellite of the earth  (d) Moon
(e) Earth 
(f) Orion 
(g) Mars 
  1. $( i) - g,e \ (ii) - a \ (iii) -c,f (iv) - d$
  2. $( i) - g,e \ (ii) - c,f \ (iii) -a (iv) - d$
  3. $( i) - a \ (ii) - b \ (iii) -c,f (iv) - d$

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Column A Column B
(i) Inner planet  (g), (e) Mars, Earth 
(ii) Outer planet  (a) Saturn 
(iii) Constellation  (c), (f) Great bear, Orion 
(iv) Satellite of the Earth  (d) Moon
Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system
Because of its highly tilted axis, ________ appears to roll along the orbital plane.

  1. Uranus

  2. Mercury

  3. Saturn

  4. Venus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A unique feature of Uranus is that it appears to roll along its orbital plane. This is because it has a highly tilted axis which makes it almost parallel to its orbital motion and the planet appears to roll.

Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system

On which two days does the Sun rise exactly in the East?

  1. April 21, July 23

  2. March 21, September 23

  3. March 23, September 21

  4. June 21, December 22
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

From summer solstice (June 21), the Sun starts moving towards the South and from winter solstice (December 22), the Sun starts moving towards North. So during summer solstice, it is in the south eastern part and in winter solstice it is in the north eastern part. However, there are 2 days, i.e., March 21 and September 23, when the Sun rises exactly in the East.

Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system
_________ stated that Sun was the centre of our universe and not Earth.

  1. Albert Einstein

  2. Isaac Newton

  3. Nicolaus Coppernicus

  4. Galileo Galilei
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

With the development of the heliocentric model by Nicolaus Copernicus in the 16th century, the sun was believed to be the center of the Universe, with the planets (including Earth) and stars orbiting it. 

Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system

Planets do not collide with each other because

  1. those are of different sizes

  2. those have fixed, non-intersecting individual orbits

  3. those rotate from West to East

  4. each planet has a different time of rotation and revolution
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Every planet is at a different distance from the Sun and has a fixed orbit in which it revolves around the Sun. The Sun"s gravitational force holds the planets in this place and they do not collide with each other as their orbits are non-intersecting.

Multiple choice physics our solar system planets of the solar system solar system and sun introduction to solar system
The time taken by a planet for one complete revolution changes according to:

  1. its distance from the Sun

  2. its size

  3. its mass

  4. the shape of its orbit
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As the distance between the Sun and the planet increases, the time taken by the planet to complete one revolution around the Sun also increases as the planet has to cover more distance as compared to the planets before it.