Contents

Earth as a Planet             


  • The earth takes two types of movements at the same time.  1) Rotation        2) Revolution.
  • Rotation (محوری گردش): The earth moves around its axis. This is called rotation.
  • The movement is from west to east, speed 1700 km/h.
  • The Earth is inclined at an angle of 23.50 at its axis.
  • Revolution (سالانہ گردش): The movement of Earth in its orbit around the Sun is called revolution. Speed of this movement about 107,000 km/h.
  • Orbit of the Earth around the Sun is oval shaped.
  • Solar Eclipse:  Some time the Moon comes between the Sun and the earth and casts its shadow on the earth, due to which the Sun is not seen completely or partially from the earth, this is called solar Eclipse.
  • Lunar Eclipse: Some time the Earth comes between the Sun and the Moon and casts its shadow on the moon, due to which the moon is not seen completely or partially from the earth. This is called lunar Eclipse.       
  • Continents and Oceans: The area of the Earth is about 510 million sq.km out of which about 29% is comprised of land and 71% is covered by water.
  • Continents (براعظم):  The land portion is comprised of seven large masses, which are called continents. There are seven continents in the worlds.

    1) Asia Continents (براعظم ایشیا ): It is the largest continent.
    2) Africa Continents (براعظم آفریقہ): It is the second largest continents.
    3) North America Continents (براعظم شمالی امریکہ): It is the third largest continent.
    4) South America Continents (براعظم جنوبی امریکہ): It is the fourth largest continents.
    5) Antarctica Continents (براعظم انٹارکٹیکا): It is the fifth largest continent.
    6) Europe Continents (براعظم یورپ): It is the sixth largest continent.
    7) Australia Continents (براعظم آسٹریلیا): It is the smallest continent.
    Ocean (بحر): A huge mass of water is called ocean. There are five oceans in the world.
    1) Pacific Ocean (بحر الکاہل): It is the largest ocean.
    2) Atlantic Ocean (بحر اوقیانوس): It is the second largest ocean.
    3) Indian Ocean (بحر ہند): It is the third largest ocean.
    4) Southern Ocean (بحرمنجمد جنوبی): It is the fourth largest ocean.
    5) Northern Ocean (بحر منجمد شمالی): It is the smallest ocean.

  • 1) Asia Continents (براعظم ایشیا ): It is the largest continent.
  • 2) Africa Continents (براعظم آفریقہ): It is the second largest continents.
  • 3) North America Continents (براعظم شمالی امریکہ): It is the third largest continent.
  • 4) South America Continents (براعظم جنوبی امریکہ): It is the fourth largest continents.
  • 5) Antarctica Continents (براعظم انٹارکٹیکا): It is the fifth largest continent.
  • 6) Europe Continents (براعظم یورپ): It is the sixth largest continent.
  • 7) Australia Continents (براعظم آسٹریلیا): It is the smallest continent.
  • Ocean (بحر): A huge mass of water is called ocean. There are five oceans in the world.
  • 1) Pacific Ocean (بحر الکاہل): It is the largest ocean.
  • 2) Atlantic Ocean (بحر اوقیانوس): It is the second largest ocean.
  • 3) Indian Ocean (بحر ہند): It is the third largest ocean.
  • 4) Southern Ocean (بحرمنجمد جنوبی): It is the fourth largest ocean.
  • 5) Northern Ocean (بحر منجمد شمالی): It is the smallest ocean.


A huge constellation of stars is called………
a) Planets                    

b) Moon          
c) Sun                         
d) Galaxy


The universe came into existence about…… years ago.
a) 20 billion                
b) 80 billion    
c) 15 billion                
d) 36 billion


Which of the following instruments are used for the observation of universe?
a) telescope                
b) Microscope
c) introscope               
d) none of these


Which of the following star is the closest star to the earth?
a) Regel                      
b) Canopus
c) Sun                         
d) Betelgeuse


Planets that revolve around the sun make a system which is called………
a) Constellation                       
b) solar system
c) black whole                        
d) none of these