Why is there ash on the earth, and why is there dust in the world

It is formed after the differentiation of stones, clay and other sunlight.

Dust is a fine dry powder of soil or other substances, which is reduced to a fine part of something; Fine powders, dust particles are generally between hundredths of a millimeter and a few hundredths of a millimeter in diameter, which are invisible to the human eye.

Dust is the enemy of human health, so people especially hate it because it carries many bacteria, viruses and insect eggs everywhere and spreads diseases. Industrial dust and fine dust can make workers suffer from a variety of difficult occupational diseases, excessive dust can also cause environmental pollution, affect people's normal life and work, induce human respiratory diseases and so on.

However, the credit of dust must not be erased. If there is no dust in the atmosphere, the sunlight will not be absorbed, reflected, scattered and refracted, and the sky will be white, without wind, snow, rain, dew, glow, and rainbows. Since dust is a hygroscopic particle, without its core, the water vapor in the air cannot condense, and it is difficult for clouds in the sky to form, and the surface of the earth will become arid and barren without the cover of clouds, and the weather will either be too hot or too cold.

Without dust, many harmful rays in the universe would break into the Earth's surface unhindered and pose a deadly threat to humans and various living beings.

In addition to these benefits, dust condenses water vapor. Let them become droplets, or everything will be wet.

Although dust has many problems, its contribution is immeasurable, it can enable the earth to gently obtain the sun's energy, and it can also make the atmosphere have enough condensation nuclei to increase the chance of cloud and rain formation; Regulate the temperature of the earth's surface to make it suitable for the survival and reproduction of life.

Dust is very harmful to the computer, too much dust may block the CPU fan, make the fan stop, cause the CPU to overheat and burn the consequences, but also affect the contact between the boards, and may also cause corrosion of the circuit board.

The dust also wasted more than a dozen years of Picklin's hard work. After Lowell predicted that there would be a Pluto, he observed it for more than ten years and never saw it. It wasn't until he discovered Pluto that he remembered that he had been in it, but he thought it was a speck of dust.

This is because the earth has a weak static electricity, and the static electricity on the ground will attract impurities and floats in the air, thus forming "ash on the ground".

The earth is made up of earth and water, and this question is still raised.

Without dust, we'd all die! One of the necessary conditions for precipitation is dust!

Dust is produced by man-made turning, animal activities and urban soil due to wind and air circulation, and is produced by industrial emissions, combustion soot, soil dust, etc.

Dust can be roughly divided into two types according to the size of the particle size:

1. Dust. Dust is a type of dust that is produced and dispersed into the air by the crushing of objects.

2. Condensation of solid smoke.

Condensed solid smoke is formed by substances during processes such as combustion, sublimation, evaporation, and condensation. Its particle size is generally up to 1 m. It is different from dust, it has great cohesion, and most of it is a gas formed during the melting process of metal substances, and after cooling in the air, it condenses into solid smoke with a relatively regular particle shape.

The dust in the room mainly comes from the dust in the air on the street, as well as the fibers and hair that fall from the fabrics such as quilts, bed sheets, and clothes.

Dead skin cells shed by the human body.

Alien soil.

Parasitic dust mites. Excrement of dust mites.

Fibers of clothing.

Some metal, paint chips.

The earth is not gray, gray is a problem with the shooting. However, it must be noted that the Earth was originally gray, but after an impact and synthesis, it became larger, and water was produced on the surface, and the Moon gradually formed at that time, and some of the water fell on Mars.

It's not gray, it's the color you gave.

In the sun, the earth is a beautiful planet with the blue of the ocean as the background, mixed with gray, yellow and green land, and dotted with white clouds.

On the side where sunlight does not shine, it is black.

The original color of the Earth captured by probes and satellites depends on the lens used to shoot it.

This image of yours was taken by the Japan Meteorological Satellite **, which is actually taken in the near-infrared band. Because the infrared penetration is relatively good, high-altitude shooting is good. Almost all weather satellite shots are grayed out.

With a specific procedure, it is possible to restore ** to the color seen by the eye. The blue image of the Earth released by NASA is the closest to the full picture of the Earth as seen by the human eye, and of course, that is the color of the side where the sun shines.

From the physical characteristics of dust, dust is a solid impurity, with many irregular shapes, mostly angular and gray, brown, black and other colors, and has water absorption. When there is a large amount of dust in the air and the relative humidity reaches a certain level, water vapor forms water droplets, so the dust is easy to be moistened by water and easy to absorb water.

Looking at its chemical properties, dust is more complex in its composition, and it can sometimes provide acid radicals and metal ions that cause degradation. Some dust is inherently acidic or alkaline, such as sulfuric acid fumes and photochemical smogs, and metal oxides and other particles are alkaline. In addition, due to the small particle size and very large surface area, the dust in the dust has a strong adsorption capacity, which can adsorb harmful substances in the air on their surface, and is acidic or alkaline.

Dust often contains substances such as clay, which can absorb moisture in the air or in materials made of archives, causing it to undergo a hydrolysis reaction to decompose the adhesive aluminum hydroxide.

Its biological characteristics: because the spores of molds are small in size and light in weight, they drift everywhere with the air, so they inevitably attach to dust, so dust is an ideal medium for microorganisms, breeding grounds and spreaders. During the growth process, microorganisms secrete mold that contains enzymes and organic acids.

Because there is earth, water, and wind on the earth.

When everything gets smaller, it's dust.