The Earth is tilted on its orbit. This causes an unequal amount of sunshine to fall in different parts of the planet during the course of a year, and this is responsible for the seasons. You can use this animation to illustrate the variations in the length of daylight, and the seasons, in the different hemispheres.
The three cities represented (Stockholm, Brazzaville and Cape town) are located on the same meridian.
The animation is not drawn to scale.
Learning objectives
To illustrate the dynamics of the Sun – Earth system.
To link the alternating seasons to the Earth’s inclination on its orbit.
To understand the effect of Earth’s inclination on the duration of daylight.
How to use the animation
Click on 'comments' to display the variation of the duration of the daylight for three cities located on the same meridian line.