Relier Pairs Planet Earth IntroVersion en ligne Introduccion de características del planeta. Movimientos del planeta y situación de las estaciones anuales. par Estibaliz Martinez 1 The rotation of the Earth is ... 2 The seasons are the result of... 3 It is spring or autumn when... 4 It is summer in the Northern hemisphere when... 5 It is winter in the Northern hemisphere when... 6 The revolution of the Earth is... its movement around its own axis. the tilt of the Earth and its orbit round the Sun. the Sun´s rays fall on the Northern hemisphere. its elliptical orbit around the Sun. the Sun´s rays fall on the Southern hemisphere. the Sun´s rays fall on the Equator.