Wind is one of the environmental factors in agricultural production. Moderate wind speed plays an important role in improving the environmental conditions of agricultural land. Near-surface heat exchange, evapotranspiration from agricultural land, and carbon dioxide and oxygen transport processes in the air accelerate or intensify as wind speed increases.
Wind can spread pollen and plant seeds, helping plants pollinate and reproduce. Wind energy is a widely distributed and inexhaustible energy source. The monsoon prevailing in China is beneficial for crop growth. On the Inner Mongolian Plateau, the Northeast Plateau, the Southeast Coast and the Inner Mountains, there are abundant wind energy resources that can be developed and used as energy.
Detailed information:
The wind makes reference to horizontal airflow. Wind direction refers to the direction of the wind; Wind speed refers to the speed of airflow. Weather services often use wind power levels to express wind speed. Wind promotes the exchange of dry, cold and warm, humid air and is often an important cause of climate change.
Wind is a natural source of energy. Long ago, humans learned to make windmills and use wind power to pump water and process food. The movement of a sailboat is also determined by the wind.
Wind plays many roles in daily life, but it also often causes disasters for humans. Storms, typhoons, hurricanes, tornadoes, etc. are very harmful to humans.
Baidu Encyclopedia - Fengwa
Baidu Encyclopedia - Feng
Read the Feng doll thinks about what the wind will blow.
1. There were several children flying kites there. Feng Doll saw it and rushed over to blow it hard. the air. They were swinging and some even doing somersaults. After a while, the kite flew away without a trace and the children were very sad.
2. The wind doll didn't know this at all. It was still blowing east and west. In this way, the wind doll caused people's clothes to dry and break them. People were angry at the newly planted small trees on the side of the road and blamed him one after another.
3. Feng Wawa no longer dared to help. He was circling in the sky with sadness, thinking: I help people do things, why blame meare they still? Feng Wawa returned home and asked her mother. His mother said, “Son, it is not enough to have good intentions when you do something. It also depends on whether it is really useful to others. »
Appreciation of the work:
strong>This article is another text without phonetic notation after "Paper Boats and Kites". Students should be encouraged to use the different methods they are familiar with to learn Chinese. characters independently.
The text is accompanied by two illustrations. One depicts a wind doll blowing a windmill. In the photo, the wind doll puffs out its cheeks, purses its mouth and blows with all its might.
Another image depicts a wind doll blowing on a kite string. She blows hard as always and carries the kite away, while the children below look panicked and don't know what to do. The images are vivides and intuitive, and the illustrations can be used to help students understand reading during teaching.
What is the Fengwawa text mainly about?
Feng Wawa's wish is to help people. At first, she only thought about helping people if she had the strength, but she also did bad things. she realized she had done something wrong. Then the things the wind doll can also do include: 1. Explode the windmill that generates wind power. 2. Blow the water on the lake, 3. Blow the branches of the trees. Blowing the clouds in the sky...
"Wind Baby" is a beautiful, easy-to-understand fairy tale, with lively language and full of interest for children. In the text, Feng Wawa thought he could do good things if he had the strength, but he ended up doing bad things with good intentions, making children understandnts that it is not enough to have good intentions when doing things, but also to see if they are really useful to others.
Let children understand that it is not enough to do something with good intentions, but also to see if it is really useful to others.
Feng Wawa came to the field and saw a large windmill rotating slowly and the pumped water flowed intermittently. He took a deep breath, puffing out his cheeks and blowing towards the windmill. The windmill suddenly turned very fast! The pumped water rushed and spilled into the fields. The rice plants drank enough water and nodded with a smile. Feng Wawa was very happy.
Feng Wawa returned to the river and saw many boatmen pulling a big boat. They were bent over, sweating and shouting “Hey, hey,” but the boat was moving very slowly. He rushed and blew hard on the sail, and the ship began torun quickly. The boatmen smiled and expressed their gratitude to the wind doll while putting away the rope.
Detailed informationWind can help people do the following things:
1. Prepare food: Wind can accelerate water loss, such as air-dried meat or air-dried fruit pulp. , etc. Xinjiang raisins are a typical dried food.
2. Drying clothes: Wind can accelerate the evaporation of water on clothes, accelerate water loss, and speed up drying of clothes.
3. Wind power generation and irrigation: The wind can turn the blades of the windmill, and then increase the rotation speed through the increase in speed to prompt the generator to produce electricity. Wind energy is a non-polluting, clean and renewable energy. Ancient people also used windmills to water crops.
4. Helpfruit trees and crops to flower and bear fruit: The wind can carry pollen away, fertilizing fruit trees and crops to flower and bear fruit.
5. Electrically Assisted Sailing Ship: In ancient times, ships without electrical systems relied on wind power to move, which greatly reduced the duration of the voyage.
6. The wind will drive away dark clouds and mist: When dark clouds block the sun, it is the wind that blows them away and allows the sun to shine. Water the earth again. When pollution is heavy in winter, it can make smog disappear.