How are natural phenomena such as thunderstorms, frost, snow, and fog formed?

Thunder When the clouds with different kinds of electricity are close (everything is charged, and the large volume is charged), the air is broken down due to excessive voltage, and the thunder is the transfer of the point emitted during the breakdown Rain When the water vapor rises to a high altitude and encounters small particles floating in the sky, it adheres to its surface to form small droplets, and a large number of small droplets form a cloud, and the small droplets collide with each other to form large droplets and fall, which is rain and frost The water vapor at night is cold on the surface of the earth and liquefies to the surface of the plant before condensing into ice crystals Snow clouds meet strong cold in the sky The liquid turns into ice Fog It is a cloud on the surface of the earth.

Thunder: It is a large-scale discharge phenomenon produced by clouds with different charges in the sky, when they are close to each other, sparks and sounds will occur when discharged, the sparks are lightning, and the sound produced is thunder. Rain:

Liquefaction of water vapor. Snow: Condensed by water vapor.

Fog: Small water droplets formed by the liquefaction of water vapor in the air.

Frost: Xiaoice crystals formed by condensation of water vapor in the air.

Dew: A small droplet of water vapor in the air that liquefies when cold.

There are also clouds: caused by condensation of water vapor. Hail: Formed by the solidification of small water droplets.

Clouds (liquefaction and condensation), rain (melting), snow (condensation), fog (liquefaction), frost (condensation), dew (liquefaction).

Clouds: Water vaporization (evaporation) Then liquefaction rain at a lower temperature at high air: small water droplets liquefied at high altitude merge into larger droplets, and when gravity is strong enough, it changes and falls to form rain.

Snow: Water vapor condenses directly in the air.

Dew: Cooler temperatures in the early morning liquefy water vapor.

Fog: Water vapor is formed by liquefaction with the help of solid dust particles.

Frost: Low-altitude condensation.

18. Explanation of common natural phenomena of several oak species: clouds, snow, rain, fog, dew, frost clouds: small water droplets formed by water vapor in the high air when it is cooled (liquefied), and these small water droplets gather together to form clouds and snow

Water vapor at high altitude, 7, clouds are small water droplets formed by water vapor in the air that clump together and liquefy.

Snow is formed by the condensation of water vapor into Xiaoice crystals, or by the condensation of water.

Rain is water vapor that gathers too much, and Pichun turns into rain.

Fog is the liquefaction of water vapor when it meets cold.

The dew is like a fog, but it is attached to something cold such as grass.

Frost is made by condensation. , 2, (a) the formation of clouds.

Clouds floating in the sky are made up of many tiny water droplets or ice crystals, and some are made up of small water droplets or Xiaoice crystals mixed together. Sometimes it also contains some large raindrops, ice and snow particles, and the base of the cloud does not touch the ground and has a certain thickness.

Cloud formation is mainly caused by condensation of water vapor.

b) Snow formation.

Ice clouds are made up of tiny ice crystals. When these Xiaoice crystals collide with each other, the surface of the ice crystals will heat up and melt somewhat, and they will stick to each other and freeze again. This is repeated many times, and the ice crystals increase. 2,

1. When the air is saturated, the air temperature decreases This is the first condition for atmospheric precipitation 2. Water vapor condensation, only the cooling of the air is not enough, the water vapor must also attach to the dust-dominated condensation nucleus in the air, forming tiny water droplets suspended in the air - clouds and fog.

3. There are clouds and there is not necessarily precipitation, because the small water droplets in the clouds are too small, and only when the small water droplets in the clouds collide and merge with each other, the volume and weight gradually increase, and they become rain, snow, hail, etc. fall to the ground, which is precipitation.

Please note that rain, snow, hail falling in the air is precipitation. Is fog and dew precipitation? Fog is a small drop of water that floats in the atmosphere, and dew is a small drop of water that condenses on the ground or on plants and does not fall from the sky and therefore is not precipitation.

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.

Hail is a type of solid precipitation that falls from cumulonimbus clouds. Hail, often referred to as hail. Hail is formed in convective clouds, when the water vapor rises with the air flow and cold, it will condense into small water droplets, if the temperature continues to decrease with the increase in height, reaching below zero degrees Celsius, the water droplets will condense into ice particles, in the process of its upward movement, and will adsorb Xiaoice particles or water droplets around it and grow, until its weight can not be carried by the updraft, that is, it will fall, when it falls to a higher temperature zone, its surface will melt into water, and at the same time it will also absorb the surrounding small water droplets, at this time, if it encounters a strong updraft and is lifted again, Its surface condenses into ice, and so on and so on, like a snowball, its volume grows larger and larger, until its weight is greater than the buoyancy of the air, that is, it falls downward, and if it reaches the ground, it is not melted into water and is still a solid ice particle, which is called hail, and if it melts into water, it is the rain we usually see.

--Congeal. Rain --- liquefaction.

Liquefaction of fog ---.

Frost --- condensation.

Snow --- condensed.

Liquefaction of cloud ---.

Poof, that's all I remember our teacher said.

Clouds: Water vapor rises to a high altitude and liquefies into small water droplets when it meets cold air, forming clouds and rain: Water vapor rises to a high altitude and liquefies into small water droplets when it meets cold air, forming clouds, and large water droplets are rain.

Snow: Condensed by water vapor.

Fog: When the temperature is higher than 0, the water vapor liquefies into small water droplets, which attach to the dust to form fog;

Frost: When the temperature is below 0, the water vapor condenses into frost.

Hail: There are also a large number of Xiaoice crystals in the clouds, and the Xiaoice crystals can melt into rain when they fall, and the small water droplets solidify into hail when they flow with 0 cold air.

Clouds: Water vapor liquefies into small water droplets when cold, and a large number of small water droplets gather in the high altitude Rain: Small water droplets gather with each other and condense into large water droplets and fall into rain and snow

Water vapor condenses into Xiaoice crystals, and these Xiaoice crystals gather into snow mist: water vapor in the air condenses into small water droplets suspended in the air.

Junior high school physics, textbooks to go to school.