EARTH & ENVIRONMENT · GRADE 3–5

Why Do We Have Seasons? 🍂

It's not about distance from the Sun — it's about Earth's tilt.

7 mins read
Includes Video
Free Worksheets
10- Questions Quiz

Learning Objectives

Why Do Seasons Happen?

Many people think seasons happen because Earth moves closer to or farther from the Sun — but that’s not true! Seasons happen because Earth is tilted on its axis by about 23.5 degrees. As Earth orbits the Sun, different parts of the planet tilt toward or away from it, changing how much direct sunlight they receive.

Why Hemispheres Have Opposite Seasons:

When the Northern Hemisphere tilts toward the Sun (summer there), the Southern Hemisphere tilts away (winter there) — and vice versa six months later.

Watch & Learn

🖼️ Illustrations

📖 Vocabulary

Axial Tilt

the roughly 23.5-degree tilt of Earth's axis, which causes different parts of the planet to receive more or less direct sunlight throughout the year
Hemisphere

one half of Earth, divided by the equator into the Northern Hemisphere and Southern Hemisphere
Equinox

one of two days a year (spring and fall) when day and night are almost exactly equal in length everywhere on Earth
Solstice

one of two days a year (summer and winter) when one hemisphere experiences its longest or shortest day of sunlight