ÎClass 4 EVS Chapter 11 Why Do We Have Seasons @kidsknowledgepoint

Why Do We Have Seasons?

Have you ever wondered why we experience different seasons like summer, winter, spring, and autumn? The changing seasons bring us hot sunny days, chilly winters, blooming flowers, and colorful falling leaves. But why do these seasons occur? Let’s explore!

1. The Earth and Its Tilt

The main reason we have seasons is because of the way the Earth is tilted. The Earth is like a big ball that spins around an imaginary line called an axis. This axis is tilted at an angle of about 23.5 degrees. As the Earth moves around the Sun, this tilt causes different parts of the planet to receive varying amounts of sunlight.

2. How the Earth Orbits the Sun

The Earth doesn’t just spin; it also moves around the Sun in a path called an orbit. It takes one full year, or 365 days, for the Earth to complete one orbit around the Sun. As the Earth moves, the tilt causes different parts of the Earth to either lean towards or away from the Sun.

• Summer: When the part of the Earth where we live is tilted towards the Sun, we get more sunlight. The Sun is higher in the sky, and the days are longer. This is why we have warmer temperatures, and it’s called summer.

• Winter: When our part of the Earth is tilted away from the Sun, we get less sunlight. The Sun stays lower in the sky, and the days are shorter. The temperatures are colder, and we experience winter.

3. Spring and Autumn

Between summer and winter, we have spring and autumn (fall). During these seasons, the Earth is not tilted too much towards or away from the Sun. In spring, the days start getting longer, and plants begin to grow. In autumn, the days start getting shorter, and leaves change color and fall from trees.

4. Why Do Different Places Have Different Seasons?

Not all places on Earth experience the same seasons. Near the equator, the region is always warm because it gets direct sunlight throughout the year. Near the poles, winter is long and cold, while summer is short. Some places even experience just two main seasons: wet and dry.

Conclusion

Seasons are a result of the Earth’s tilt and its journey around the Sun. They bring changes in weather, temperature, and daylight, making our planet more interesting and diverse. Understanding why we have seasons helps us appreciate the beauty of nature throughout the year!