Why does the Earth appear blue from the space?  

How was the Earth formed?  

Why one half of the Earth experiences day and other half experiences night? 

The Earth is not flat but round. Give reason. 

How does the change of seasons occur on the Earth?  

Differentiate between axis and orbit of the Earth.  

Describe the phenomenon of rotation of the Earth. 

Do you know that when it is day in India, it is night in America?  

At 5 o’clock in the morning, the Earth suddenly stops rotating. It doesn’t rotate for the next 6 hours. Will it make any difference?