How many quarters are there in a year?

There are four quarters in a year, specifically divided into: the first quarter: 65438+ 10-March; The second quarter: April-June; Third quarter: July-September; The fourth quarter: 65438+ 10-65438+February. The so-called "season" is to divide a year into four parts in the order of spring, summer, autumn and winter.

In addition to seasons, there is another concept called seasons. If it is strictly divided according to the latitude of China, March will enter spring, then March-May will be spring; June-August is summer; September-1 1 is autumn; 12- February is winter.

Spring ranks first among the four seasons, and a new cycle begins. Spring represents warmth, growth, plant germination, warm weather and flowers.

Everything is thriving in summer, which is the peak season for crop growth. The temperature rises, the weather is hot, storms are frequent, and everything flourishes.

Autumn is the harvest season, which means that everything begins to mature from lush. In the first two solar terms in autumn, beginning of autumn is in summer, and the weather is still very hot. Because the heat brought by the sun has not weakened, the so-called "heat is in the dog days." The dog days appear between midsummer and hot summer, which is the highest, wettest and sultry day of the year.

In winter, yin and yang change, everything is hidden but not collected, and plants are angry and closed. After entering beginning of winter, it means that the dry climate with little rain in autumn has gradually passed and turned into a rainy and cold winter climate. The height of the sun in the northern hemisphere is small and the days are short. The so-called "dog days are hot", the cold is on March 9, and the solstice in winter is "September 19". It was not too cold before the winter solstice. After the winter solstice, strong cold air frequently goes south and crosses Nanling, and the temperature drops sharply and the weather is cold. Winter is really cold, the solstice after winter.

Description of the gradual change of seasons

The gradual changes of the four seasons are not uniform all over the world. It is summer in the northern hemisphere and winter in the southern hemisphere. The northern hemisphere changes from warm to cold, and the southern hemisphere changes from cold to hot. The length of day and night and the height of the sun change periodically in different seasons.

When the earth is in different positions in the orbit of revolution at different times of the year, different places on the earth receive different sunlight and different heat from the sun, which leads to seasonal changes and differences between cold and hot.

The four seasons on the earth are not only periodic changes in temperature, but also periodic changes in the length of day and night and the height of the sun. It affects or determines the movement rhythm of many things in the earth's environment, especially the adaptation of creatures.

Seasonal change covers many characteristics such as climate change and phenological change. The periodic changes of the four seasons also indicate the development process of things, such as spring germination, summer growth, autumn harvest and winter storage.

Baidu Encyclopedia-Four Seasons (the floorboard of spring, summer, autumn and winter)