Why We Have Seasons (Science of Winter and Summer)?

We have seasons because Earth is tilted as it goes around the Sun, making some parts warm and others cold at different times of the year.

Imagine you're spinning on a lazy Susan in your kitchen. If you’re sitting near the edge, you get more light from the lamp, that's like being in summer. But if you move closer to the center, you get less light, that’s like being in winter.

Earth is like that lazy Susan. It spins around its own axis once a day, and it also goes all the way around the Sun once a year. But Earth is tilted, kind of like when you lean your chair back while sitting on it. So when one part of Earth is tilted toward the Sun, that part gets more sunlight and summer happens there. The other side is tilted away from the Sun, so it gets less light and has winter.

When Earth goes around to the other side of the Sun, everything flips, summer moves to the other half of the planet, and winter moves with it!

That’s why we have seasons, because of Earth's tilt as it travels around the Sun.

Take the quiz →

Examples

  1. A child wonders why it's cold in winter and warm in summer.
  2. Someone asks why the days get longer in summer.
  3. A student learns about Earth's tilt for the first time.

Ask a question

See also

Discussion

Recent activity