A diagram showing the Earth's rotation around the sun and the corresponding seasons in the Northern and Southern Hemispheres.
The poster also includes information about summer and winter.
It is warmer in summer because the sun is high in the sky. This gives direct sunlight to the ground and makes the days longer.
It is cooler in winter because the sun is low in the sky. This gives indirect sunlight to the ground and makes the days shorter.
Download includes full colour and low colour versions.