How to draw a schematic diagram of the formation process of clouds, rain, fog, frost, dew, snow and hail (physics)
The schematic diagram is as follows:
Cloud: The temperature is higher during the day, and surface water evaporates a lot, so the air contains a lot of water vapor. At this time, after the water vapor rises to the cold high altitude, part of it liquefies into small water droplets, and part of it condenses into small ice crystals. The clouds in the sky are composed of a large number of small water droplets and small ice crystals. (Liquefaction and condensation)
Rain: When the clouds gather more and more and become thicker, they begin to fall. As the temperature rises during the fall, the small ice crystals in the clouds melt. It turns into small water droplets and falls to the ground together with the original small water droplets in the cloud. This is rain. (Melt)
Fog: If there is a lot of floating dust in the air, the water vapor will liquefy into small water droplets when cooled and attach to the floating dust, and float in the air together with the floating dust. This is fog. (Liquefaction)
Dew: When the weather is hot, the water vapor in the air encounters the cooler leaves, flowers, plants, etc. before morning, and liquefies into small water droplets attached to their surfaces. This is dew. (Liquefaction)
Snow: When water vapor rises to a very cold altitude, the water vapor condenses into hexagonal ice flakes. The ice flakes gather together to form snow flakes or snow clumps and fall down. This is snow. (Condensation)
Frost: At night, when the temperature drops below 0 degrees Celsius, the water vapor near the ground encounters cold objects on the ground, and condenses into small solid particles attached to the objects. This is frost. (Condensation)
Hail: It is formed in convective clouds. When water vapor rises with the air flow and encounters cold, it will condense into small water droplets. If the temperature continues to decrease with increasing altitude and reaches below zero degrees Celsius, the water droplets will It solidifies into ice particles. During its upward movement, it will absorb small ice particles or water droplets around it and grow until its weight cannot be carried by the updraft and then it will fall;
When it falls When it reaches a higher temperature zone, its surface will melt into water and also absorb the surrounding small water droplets. At this time, if it encounters a strong updraft and is lifted again, its surface will solidify into ice again;
It keeps growing like a snowball until its gravity is greater than the sum of the lift force of the airflow and the buoyancy of the air, that is, it falls downwards. If it does not melt into water but remains in the form of solid ice particles when it reaches the ground, it is called hail. . (Solidification)
Extended information
It should be noted that for any substance, any final state can actually be changed from two initial states! For example, if the final state of a substance is liquid, then the initial state of the substance can be solid or gaseous. If the substance changes from solid to liquid, it is melted; if it changes from gas to liquid, it is liquefied!
Water comes in two solid forms: frost and snow. But their formation mechanisms are different. Frost can only form on a clear night, when the temperature drops below 0 degrees, and there is no strong wind that night. The water vapor in the air condenses into small particles, which are white, and that is frost.
There are more rivers and humid depressions, because those places have more water vapor and lower temperatures. Crops generally stop growing during the frost period, and some crops will be frozen to death. Measures should be taken, such as using smoke and covering the crops with films to keep them warm.
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