What happened in winter?

What changes have taken place in winter? The picture is as follows:

Winter came, the trees withered, and all the leaves on the trees fell off. In winter, there is less sun, strong wind, more fog, less rain, dry weather and snow. Some animals hibernate when they want to. For example, snakes will definitely not come out at this time. The north wind blows your ears, your face hurts like a knife, it's cold, your skin will be dry, your lips will be chapped, so drink more water.

There are the following changes: first, the temperature changes, especially in the north, will become very cold, some places are closed by heavy snow, and some places drip into ice. The lowest temperature can reach -40 degrees.

Plants have changed, and their leaves have changed color. Some of the plants planted are harvested, and some of them return to nature and stand in the soil with their heads held high.

People have changed. After a busy year, they are going to see winter. They put on winter clothes, prepare winter clothes, store winter vegetables, potatoes and grain, prepare new year's goods, and so on. With the change of animals, they put on the receding fluff one by one, put on their winter clothes again and prepare food for the winter.

One revolution of the earth is one day (24 hours), and one revolution of the earth around the sun is one year (365 days). At the same time, the sun has the law of moving north and south. When the sun is close to the Tropic of Cancer, most parts of the northern hemisphere of the earth are in the period of the widest solar exposure, almost in a direct state (except equatorial direct). At this time, the surface and air temperature in the northern hemisphere rose rapidly, and a strong tropical pressure was formed in the Pacific Ocean, which intercepted and impacted the cold air.