Teaching videos on the role of wind can start from the following aspects:
1. Wind can blow sailboats and help people walk. Especially in ancient times, transportation mainly relied on ships. Li Bai's poem "The Road is Difficult" has a poem: "There will be strong winds and waves, and the clouds and sails will rise to help the sea."
2. The wind will blow away the dark clouds and bring us sunshine. When dark clouds block the sun, it is the wind that drives them away, allowing the sun to fill the earth again.
3. Ancient people used windmills to water crops.
4. In the hot summer, the wind brings us coolness.
5. Now people have also learned to use wind energy generators to generate electricity. This is pollution-free, clean energy, and renewable.
6. Wind blowing clouds can promote the exchange of dry, cold and warm and moist air, mix and balance a wide range of heat and water vapor, and regulate the temperature and humidity of the air. This is what the ancients said: "The clouds turn into rain, and the dew turns into frost." Wind can send clouds and rain to distant places, completing the water cycle on the earth.
7. The wind will blow the flowers and help the plants spread. We understand that the spread of many plants depends on the power of wind. The so-called "peach blossoms and elm pods have no ingenuity, they can only solve the problem of snow flying all over the sky." It relies on the power of the wind.
Wind is a natural phenomenon caused by air movement, which is caused by solar radiation heat. Sunlight shines on the surface of the earth, causing the surface temperature to rise. The air on the surface expands due to heat and becomes lighter and rises. After the hot air rises, low-temperature cold air flows in laterally. The rising air gradually cools and becomes heavier and falls. The higher surface temperature heats the air and causes it to rise. This flow of air creates wind.