Earth rotates on an axis. During the winter, the North Pole is tilted away from the Sun's rays. As Earth travels around the Sun, the tilt of Earth changes. By June, the North Pole is tilted towards the Sun and the days become very long. Earth takes a year to orbit the Sun and it is the tilt which creates the seasons.

First broadcast:
12 October 2007

After watching the clip, discuss the effects on our seasons of Earth orbiting the Sun. Teachers could demonstrate this phenomenon further by using a torch and an inflatable globe or ball. The pupils could be given different countries to locate on the globe and decide when would be the best time of year to take a 'sun-seeking' holiday there. Alternatively, pupils could research best locations and times for taking a skiing holiday, supporting their choices by explaining the position of the country in relation to the Sun at different times of the year.