Why do some countries in the world experience four seasons while like Singapore not?

Earth's tilt: The Earth's axis is tilted at an angle of 23.5 degrees relative to the Sun. This tilt is responsible for the seasons because it causes the amount of sunlight that reaches different parts of the Earth to vary throughout the year.

Seasons in different parts of the world:

* Temperate zones (between 23.5 degrees and 66.5 degrees latitude): These zones experience four distinct seasons: spring, summer, autumn, and winter. This is because the tilt of the Earth's axis causes the Sun's angle of incidence to change throughout the year, resulting in different amounts of daylight and solar radiation.

* Tropical zones (between 0 degrees and 23.5 degrees latitude): These zones experience little seasonal variation in temperature or daylight hours. This is because the Sun's rays are always at a high angle, resulting in a relatively consistent climate throughout the year. Singapore is located near the equator and experiences a tropical climate.

* Polar zones (above 66.5 degrees latitude): These zones experience extreme seasonal variations, with long periods of daylight during the summer and long periods of darkness during the winter. This is because the Sun's rays are at a very low angle, resulting in a lack of solar radiation during the winter months.

In summary, the Earth's tilt causes different parts of the planet to receive different amounts of sunlight throughout the year, resulting in the distinct seasons experienced in temperate regions. Singapore's location near the equator means that it experiences a tropical climate with little seasonal variation.