How do the seasons change?

four_seasons

How do the seasons change? The change of the seasons is such a basic process of life on Earth that many people don’t even notice it deeply enough to wonder — how?

Give it a moment of thought, and you may think that summer happens when the Earth is closest to the sun, and that winter happens when the Earth is farthest from the sun. But can that idea explain how summertime in Canada is wintertime in Australia?

Actually, the Earth and the sun are closest to each other in January. So the relative closeness of Earth and sun is not what drives the regular, beautiful, reliable change of the seasons.

If you want to learn what does drive seasonal change, have a look here:

Where Does Summer Come from: Exploring the Cycles of Earth-Sun Geometry

You need to have MS Word to view the information on this site. Section 2.2 specifically addresses how and why the seasons change. Section 1 is an envisioning exercise that helps with the understanding of Section 2.  The third section is about the Milankovitch cycles, three slow-acting cycles of the Earth’s movement that some scientists believe help cause climate change.

3 responses to “How do the seasons change?

  1. ROBERT DICKINSON

    I’D LIKE TO USE THIS IMAGE -SEASONS CHANGE
    IN A CARD FOR MY MOM,
    MAY I HAVE PERMISSION?

  2. Robert, It’s not my image. I think you’re fine to use it for private, nonproift use.

  3. This was great!!! I loved it!!!!! Hi kendalll!!!!!

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