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 It is summer in the Northern hemisphere when... 2 The revolution of the Earth is... 3 It is spring or autumn when... 4 It is winter in the Northern hemisphere when... 5 The rotation of the Earth is ... 6 The seasons are the result of... the tilt of the Earth and its orbit round the Sun. its movement around its own axis. its elliptical orbit around the Sun. the Sun´s rays fall on the Equator. the Sun´s rays fall on the Northern hemisphere. the Sun´s rays fall on the Southern hemisphere.