THE SEASONS

The Earth orbits the Sun. This causes the four seasons.

In the Northern Hemisphere the seasons are:

Spring: 21^st March to 20^th June.

Summer: 21^st June to 22^nd September.

Autumn: 23^rd Septembre to 21^st December.

Winter: 22^nd December to 20^th March. 

The Earth´s orbit:
http://www.primaria.librosvivos.net/archivosCMS/3/3/16/usuarios/103294/9/3EP_Science_ud9_orbit_1/frame_prim.swf