Children's songs of the grade of wind

There are two versions of children's songs about the level of wind.

Version 1 of the 12-level wind song: there is no wind and no smoke on the ground, the first-level light smoke deflects with the wind, the leaves ring in the second-level breeze, the red flag flutters in the third-level branches, the fourth-level dust dances on the ground, the fifth-level water waves, the sixth-level strong wind make it difficult to hold an umbrella, the seventh-level trees are difficult to walk, the eighth-level wind blows off the branches, the ninth-level roof tiles fly, the tenth-level strong wind can pull up trees, and the eleventh-second-level ground.

12 Level Wind Songs Second Edition: Zero-level smoke column goes straight into the sky, the first-level light smoke deviates from the wind, the second-level light wind blows the surface, the third-level leaves move the red flag, the fourth-level branches shake the paper, the fifth-level small trees with leaves shake, the sixth-level umbrella is difficult to walk, the seventh-level wind is inconvenient to walk, the eighth-level wind blows off the branches, the ninth-level roof tiles fly, and the tenth-level trees fall down again. See you in the 112-level sea area.

Wind speed power

Wind speed is the forward speed of the wind. The greater the air pressure difference between two adjacent places, the faster the air flow, the greater the wind speed and the greater the wind force. Therefore, the magnitude of wind is usually expressed by wind power. The unit of wind speed is meters per second or kilometers per hour. When releasing the weather forecast, the formula is "from all the way to nine, all levels are multiplied by two." It means that from 1 level to 9 level, the maximum wind speed can be roughly obtained by multiplying each level by 2.

There are transitional figures between different levels of wind, such as1-2m per second for the first level wind, 2-4m per second for the second level wind and 4-6m per second for the third level wind. By analogy, wind power can be converted into corresponding wind speed, that is, the distance that air flows in unit time, in meters per second.