Respuesta :
The combination of Earth's tilted axis and its revolution causes the atmosphere to be unequally heated by the sun.
Answer:
Earth revolves around sun in 1 year. It moves in nearly circular orbit. Seasons are caused on Earth due to the tilt of the earth. Earth's axis is tilted to about 23.5 degrees from the horizontal. When it moves in its orbit, sometimes norther hemisphere faces sun and sometimes it faces away from sun and then the southern hemisphere faces towards it.
So, the part which faces towards sun experiences summer while the other which is away faces winters.
