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4 seasons #1 HTML5


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.

Click on 'comments' to display the variation of the length of the day for three cities located on the same meridian line.

Learning goals

  • 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.

Learn more

During the solstices, the hemisphere tilted towards the sun, where it is summer, receives more solar energy than the one tilted away from it, where it is winter. During the equinoxes, both…

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