* Earth's Tilt: Our planet's axis of rotation is tilted at approximately 23.5 degrees. This tilt means that different parts of the Earth receive varying amounts of direct sunlight throughout the year.
* Summer: When the Northern Hemisphere is tilted towards the Sun, it experiences summer. The days are longer, the Sun is higher in the sky, and the Earth receives more direct sunlight, leading to warmer temperatures.
* Winter: When the Northern Hemisphere is tilted away from the Sun, it experiences winter. The days are shorter, the Sun is lower in the sky, and the Earth receives less direct sunlight, resulting in colder temperatures.
* Spring and Autumn: These seasons occur during the transition periods when the Earth's tilt is neither towards nor away from the Sun.
Key Points:
* The Earth's orbit around the Sun is almost circular: This means that the distance between the Earth and the Sun doesn't significantly change throughout the year.
* The tilt, not distance, is crucial: It's the tilt that causes the variation in sunlight intensity and ultimately determines the seasons.
* Opposite Hemispheres: While one hemisphere experiences summer, the other experiences winter due to the Earth's tilt.
In summary, the Earth's tilt is the primary reason why we experience seasons. This tilt causes different parts of the Earth to receive varying amounts of direct sunlight throughout the year, leading to changes in temperature and daylight hours.
