Relier Pairs Imaginary linesVersion en ligne Imaginary lines par Luz Álvarez Herrero 1 It begins on 21 March in the Northern Hemisphere 2 When we are measuring in degrees North or South we are measuring... 3 It divides the Earth into two hemispheres 4 It is the most important meridian. It is meridian 0º 5 It begins on 21 June in the Southern Hemisphere 6 It begins on 21 June in the Northern Hemisphere 7 They go from the North Pole to the South Pole 8 The Earth takes 365 days and 6 hours to make this movement. It causes the seasons 9 When we are measuring in degrees West or East we are measuring... 10 The Earth takes 24 hours to make this movement. It causes day and night Meridians ROTATION SPRING LONGITUDE EQUATOR REVOLUTION WINTER SUMMER LATITUDE Greenwich Meridian