Social study , class-3

1:- What does our universe include?
Ans:- Our univers includes planets, stars, galaxies and other vast bodies. 

2:- What does the big bang theory say about the formation of the universe?
Ans:- According to the big bang theory , a big explosion was happened thousands of years ago. our universe came into existence due to this bang.

3:- On which planet do we live?
Ans:- We live on planet earth.

4:- In which galaxy do we live?
Ans:- We live in milky way galaxy.

5:- What are orbits?
Ans:- All planets of solar system revolve in their fixed paths called orbits.

6:- What are planets?
Ans:- those celestial bodies which revolve around the sun are called planets.
            Example:- earth, jupiter

7:- How many planets in solar system? Name them.
Ans:- There are eight planets in solar system-mercury, venus, earth, mars, jupiter, saturn, uranus, neptune.

8:- Who is the biggest planet of solar system?
Ans:- Jupiter

9:- Who is the smallest planet of solar system?
Ans:- Mercury

10:- Who is the hotest planet of solar system?
Ans:- Venus

11:- Who is known as red planet?
Ans:- Mars

12:- Who is known as brightest planet of solar system?
Ans:- Venus

13:- What is a satellite?
Ans:- A satellite is a heavenly body that revolves around a planet.
          Example:- moon

14:- What is an asteroid?
Ans:- An asteroid is a small, irregularly shaped, rocky body that orbiting the sun.

15:- What is a comet?
Ans:- A comet is a small, icy object orbiting the sun.

16:-Tick the correct answer.

1. It means the whole of creation. It means everything that exists.

                a-  galaxy                                 b-  univere                                        c-  asteroid

2.The milky way is the name of a 

                a-  galaxy                                 b-  comet                                          c-  asteroid

3. This theory describes the formation of the universe

                a-  Big Bang                             b-  Bam Bang                                  c-  Bang Bang

4.We live on planet

                a-  Mars                                    b-  Earth                                           c-  Mercury

17:-  Fill in the blanks using the given clues

wanderer

sun

not

galaxy

 

          1- The size of the whole universe is __________ known.

          2-A __________ contains millions of stars gathered together in large groups.

          3-The word planet means __________ .

          4-All the planets revolve around the __________.