The formation process of frost, fog, hail, fog, rain, snow, frost and hail

Fog and clouds are water vapor condensates made up of small droplets or ice crystals floating in the air, except that fog is formed in the near-surface layer of the atmosphere, while clouds are formed in the higher layers of the atmosphere. Since fog is a condensate of water vapor, its cause should be found in the conditions that cause the condensation of water vapour. There are two reasons why water vapour in the atmosphere is saturated

One is due to evaporation, which increases the water vapor in the atmosphere; The other is due to the cooling of the air itself. Cooling is more important for fog. When there are condensation nuclei in the air, condensation occurs when the saturated air continues to increase or smelt.

Fog forms when condensed water droplets reduce horizontal visibility to less than 1 km.

The formation of frost is related not only to the weather conditions of the time, but also to the properties of the object to which it is attached. When the temperature of the surface of the object is very low, and the air temperature near the surface of the object is relatively high, then there is a temperature difference between the air and the surface of the object, if the temperature difference between the surface of the object and the air is mainly caused by the radiative cooling of the surface of the object, then the air will cool when the warmer air and the colder surface of the object come into contact, and the excess water vapor will precipitate when the water vapor is supersaturated. If the temperature is below 0°C, the excess water vapor condenses into ice crystals on the surface of the object, which is called frost.

Therefore, frost always forms in weather conditions that favor radiative cooling of the surface of the object.

The formation of frost is related not only to the above-mentioned weather conditions, but also to the properties of ground objects. Frost is formed on the surface of an object that is radially cooled, so the more easily the surface of the object radiates heat and cools quickly, the easier it is to form frost on it. Under the same conditions, if the mass of the same object is the same, the amount of heat contained in it is also the same.

If they radiate heat at the same time during the night, then at the same time, objects with a larger surface area dissipate more heat and cool faster, and frost is more likely to form on it. That is, an object that has a relatively large surface area in relation to its mass is prone to frost formation on it. The blades of grass are very light, but the surface area is large, so the blades of grass are prone to frost.

In addition, a rough surface of an object is more conducive to radiation heat dissipation than a smooth surface, so frost is more likely to form on objects with a rough surface, such as clods.

Summer down: when the raindrops in the clouds meet a violent rising air flow and are brought to a high altitude below 0, they liquefy into Xiaoice droplets; When the airflow weakens, the Xiaoice beads fall; When the updraft containing water vapor increases again, the Xiaoice beads rise and increase again; Jumping up and down like this, the small Xiaoice beads may gradually become large hailstones and finally fall to the ground.

Hail: It turned out to be a large drop of rain, but in the process of falling, due to the low temperature, it condensed into ice and fell to the ground, which is called hail.

Fog: Water vapor liquefies on the ground into small water droplets that float near the ground.

Frost: Xiaoice crystals formed by water vapor condense on the ground or plants.

Hail: Rainfall can be formed as water vapor in the clouds gathers, and hail can be formed if cold air is encountered during the rainfall.

Fog is formed by the liquefaction and exothermic of water vapor.

It is formed by the liquefaction and exothermy of rain and water vapor.

Snow and water vapor are formed by condensation and exothermy.

Frost and water vapor are formed by condensation and exothermy.

Dew vapor liquefaction and exothermic formation.

Hail water vapor condensation and exothermic formation.

Fog: Dust in the air is formed by passing through. Remember to wear a mask when it is foggy, inhaling too much is harmful to the body.

Rain: Water vapor in the air drifts to the clouds and collects into water droplets when it collects to a certain amount.

Snow: Water vapor in the air drifts to the clouds and gathers to a certain amount, and when it is collected to a certain amount, it directly condenses into ice crystals due to air pressure and low temperatures.

Frost: Similar to the formation of snow. The different one is falling from the sky. One is the water vapor from the ground.

Dew: If the water vapor on the ground does not reach 0 degrees. No condensation will be formed. Instead, it liquefies into water droplets.

The water vapor rises with the air flow, the higher the height and the lower the temperature, the water vapor will condense into liquid water droplets; If the altitude continues to increase and the temperature drops below zero degrees Celsius, the water droplets will condense into solid ice particles.

In the process of moving with the air flow, the ice particles will absorb nearby Xiaoice particles or water droplets, and gradually become larger and heavier, and when the updraft can not bear its weight, the ice particles will fall down, but the ice particles at this time are not large enough, if you can encounter a more powerful updraft, push the ice particles down and push them up, and the ice particles can continue to absorb small water droplets and condense into ice.

Under the repeated rise and fall adsorption and condensation, the ice particles will become larger and larger, and when the ice particles are big and heavy enough, and there is not enough updraft to push them up, they will fall to the ground. If it reaches the ground, it is still a solid ice particle, which is called hail, and if it melts into water and falls, it becomes rain.

Categories: Life >> common sense of life.

Analysis: The water in the ocean, lake, plant surface, and soil is evaporating all the time, turning into water vapor and entering the atmosphere. Moist air containing water vapor rises upwards for some reason.

During the ascent process, as the surrounding air becomes thinner and thinner, the air pressure becomes lower and lower, and the volume of the rising air expands. When it expands, it dissipates its own heat, so the temperature of the rising air decreases. When the temperature decreases, the ability to contain water vapor becomes smaller and smaller, the saturated water vapor pressure decreases, the water vapor in the rising air quickly reaches a saturated state, and the temperature decreases again, and the excess water vapor attaches to the condensation nucleus suspended in the air and becomes small water droplets.

If the temperature is lower than 0, the excess water vapor condenses into ice crystals or supercooled water droplets. They are gathered together, supported by updrafts, and float in the air as clouds that we can see.

Clouds made up of liquid water droplets, including supercooled water droplets, are called hydrogenic clouds. If there are conditions for the cloud droplets to increase into raindrops and make the raindrops have a certain rate of decline, then it is rain or drizzle that falls. Clouds made up of ice crystals are called cryogenic clouds, while clouds that are made up of water droplets (mainly supercooled water droplets) and ice crystals together are called hybrid clouds.

Ice crystals or snowflakes that fall from ice-forming clouds or mixed clouds fall into the air layer above 0, and after melting, they also become raindrops that fall to the ground, forming rainfall.

If we know that after evaporation, sublimation, condensation, and condensation, we can easily understand that I am dizzy, and the rest of us go to see the information, and the trouble is dead

1. The formation of clouds and their physical changes.

1. Causes: When the sun shines on the ground, the water temperature rises, and the high-temperature air containing water vapor rises rapidly, and in the process of rising, the air gradually cools, and the water vapor liquefies into small water droplets or condenses into Xiaoice crystals, forming clouds.

2. Name of change of state of matter: liquefaction or condensation.

2. The formation of rain and its physical changes.

1. Cause: When the small water droplets in the clouds merge into large water droplets, rain is formed.

2. Name of change of state of matter: liquefaction or melting.

3. The formation of fog and its change of state of matter.

1. Cause of formation: Fog is a small water droplet formed by water vapor liquefied in the air when it encounters cold air, and these small water droplets are suspended in the air, which is called fog near the ground.

2. Name of change of state of matter: liquefaction.

Fourth, the formation of dew and its physical state change.

1. Cause: When the weather is hot, the water vapor in the air meets the leaves, flowers and plants with lower temperature in the morning, and liquefies into small water droplets attached to their surfaces.

2. Name of change of state of matter: liquefaction.

5. The formation of frost and snow and their physical changes.

1. Formation reason: frost is directly condensed into solid when the water vapor on the surface encounters a temperature below 0, if the temperature at high altitude drops below 0, the water vapor directly condenses into Xiaoice crystals, and the water falls back to the ground in the form of snow.

2. Name of change of state of matter: Ninghua.

6. The formation of hail and its physical changes.

1. Causes: Hail is a large size of ice balls, the water droplets in the cloud are brought to the air temperature below 0 by the updraft, condensed into Xiaoice beads, when the Xiaoice beads fall, its outer layer is heated and melted into water, and combined with each other, so that the ice beads are getting bigger and bigger, if the updraft is very strong, it will rise into the air again, forming a layer of ice crust on its surface, after many times up and down, can be combined into larger ice beads, when the updraft can not support it, the ice beads fall to the ground, forming hail.

2. Name of change of state of matter: condensation, melting, solidification, etc.

Rain: Water vapor liquefies into small water droplets or ice crystals melt into small water droplets that fall to the ground to become rain and snow: Ice crystals formed by water vapor condense fall to the ground.

Clouds: small water droplets or Xiaoice crystals formed by water vapor liquefied floating in the airFog: water vapor liquefifies into small water droplets on the groundFloats near the ground Dew: Water vapor liquefies into small water droplets on plants on the ground.

Frost: Xiaoice crystals formed by water vapor attach to the ground or plantsHail: As the water vapor in the cloud gathers, rain can be formed, and if cold air is encountered during the rainfall, hail will be formed.

, simple and easy to understand: there is always water vapor in the air, and water vapor is a colorless and transparent gas, which is invisible. The "white steam" we see every day is not water vapor, but small water droplets formed by water vapor liquefied when it is cold.

1. How are clouds formed?

When the air with a lot of water vapor rises into the air, the water vapor temperature decreases and liquefifies into small water droplets or condenses into Xiaoice crystals, and these small particles can be lifted by the air updraft to form floating clouds, so the clouds are composed of a large number of water vapor and Xiaoice crystals.

2. How is rain formed?

Under certain conditions, the small water droplets and Xiaoice crystals in the cloud become larger and larger, and when they reach a certain level, the updraft cannot support them, and they will fall, and in the process of falling, the Xiaoice crystals melt into water droplets and fall to the ground together with the original small water droplets, forming rain.

3. How is fog formed?

Fog generally appears early in the morning. Fog is formed when water vapor in the air meets cold air or when the ground temperature drops suddenly, it liquefies into small water droplets and floats in the air and on the dust.

4. How is dew formed?

When the ground temperature drops, the water vapor in the air will liquefy into small droplets that attach to the ground or flowers and plants when the ground temperature drops, forming dew.

5. How is snow formed?

In winter, sometimes the updraft is weak, and the water vapor in the clouds is cooled and condenses directly on the Xiaoice crystals to form snowflakes, which fall to the ground surface to form snow.

6. How is frost formed?

It is formed by the direct condensation of water vapor in the air by cold. On winter nights, the temperature of the ground quickly drops below 0 and the air.

The water vapor will quickly condense on the ground to form small crystals in a solid state, known as frost.

7. How is hail formed?

In summer, the updrafts are strong and unstable, and small water droplets are condensed in the air convection into Xiaoice hail. Xiaoice hail blocks merge with Xiaoice crystals and small water droplets in the process of flow to form large ice blocks, and when such ice blocks increase to a certain extent, the air flow cannot support them, and they fall to the ground to form ocean hailstones.

Rain – the condensation of water vapor in the air.

Snow – small droplets of water in the air solidify.

Clouds – the same (not very clear).

Fog – Water vapor in the air liquefies into small droplets.

Dew - Same (changed to: small droplets).

Frost - water vapor in the air condenses.

Hail - Same (changed to: small droplets).

Rime, frost, and snow belong to Ninghua.

Fog is liquefied.

Rain can be formed by liquefaction, melting, etc.

Hail can be either solidification or blooming.

Hail A ball or block of ice that falls to the ground with a diameter of 5 mm to 10 cm is called hail. Hail is the result of a combination of water vapor condensation and freezing of water droplets in thunderstorm clouds. Xiaoice hail with a diameter of less than 5 mm is also known as freezing rain or ice pellets.

Hail formation requires convective clouds with strong updrafts (e.g., cumulonimbus) and is therefore often accompanied by thunderstorms. , 10, condensation, 2, all are small droplets of water, condensation, 1, rime, frost, and snow are condensation stools; What is left behind is liquefaction. ,1,Rime,Frost,Snow,Hail Condensation Fog,Rain,Melt,1,Ahem!

Let me tell you about the rain, the snow and the hail!

Every day, the sun rises high, and so do we, go to school normally.

But although the sun is very ordinary, ordinary, its sunlight can 'absorb rotten and coarse water' (I don't know how to say it), and the water rises high into small droplets, and the small droplets take the filth of the sky and turn into clouds.

When the number of small water droplets in the cloud exceeds the number that the cloud can hold, they fall one after another, and it is rain.

If they fall with very cold air, then on the way down, they slowly change. 1,