day and night

 Firstly , Did you know that night  is caused by the rotation of the earth?
The earth has something called an axis .

 Secondly ,  the axis makes the earth rotate .  The Earth not only turns on its axis it all so orbits the sun . The axis of earth  is actually tilting a little bit .


Thirdly
,the earth orbiting the sun is caused by the magnetic field of the Sun .   In addition the Earth takes 365 days to orbit the sun also known as  1 year . 

Lastly,the tilti cause one side of the earth to have day and the other side is night this means that different sides of the earth get  a  different amount of sunlight .