Science Common Sense

1309 - Why are there four seasons on Earth mainly caused by the tilt of Earth's rotation axis relative to its orbital plane.

Imagine the Earth as a big ball rotating in space around the Sun. The Earth's rotation axis is like an invisible line through the North and South Poles.

This invisible line is tilted a bit, about 23.5 degrees, as the Earth moves around the Sun. This tilt causes different parts of the Earth to get varying amounts of sunlight throughout the year.

Here's how it affects us: - When the North Pole is tilted towards the Sun, the Northern Hemisphere gets more sunlight and it's summer there. - When the North Pole is tilted away from the Sun, it receives less sunlight and it's winter there.

As the Earth keeps moving around the Sun, the tilt of the axis causes the seasons to change. This is why we have four seasons: spring, summer, autumn (or fall), and winter.

So, the Earth's tilt is the main reason we experience different seasons throughout the year.