The role of dust is at least 200 words, what is the role of dust

Because there are thousands of dust floating in the air all the time, but we can't see it with the naked eye. Some people will say, "Aren't we living in a dirty world?" In fact, this is not the case, so to speak, if there is no dust, there may be no life, there will not be so many beautiful scenes in nature.

Because the dust floating in the air can slowly condense the moisture in the air, when the moisture condenses more and more, and the air cannot bear the weight, it will drip to the ground, and this process is the process of forming rainwater. Water droplets in the air will also dissolve many substances in the air during the floating or falling process, such as harmful gases, which also has a certain effect on cleaning the air. All of this can be attributed to the role of dust, so don't underestimate it

First of all, we were born from industrial emissions, combustion dust, soil dust, etc. If it weren't for the fact that we absorb part of the sun's rays and scatter them around, the light will be greatly weakened and softened. You've been sunburned to death.

Our dust family all has a function that no one else has – moisture absorption, because water vapor must adhere to our body, and without us, the earth would be wet. This is not serious, if we do not have clouds, it will be difficult to form, and it will not rain or snow. The refraction of light by these small raindrops will give you beautiful scenery such as sunset, idle clouds and mist, and rainbow sunset.

Now, do you think we don't matter?

Dust has many functions, for example, it can be used as fertilizer, and people used it to soak in water to make agricultural fertilizer. It can also be used to repel mosquitoes.

Yes! If you don't believe me, go check it out.

Dust is something that everyone hates, and I am no exception, but after reading the text we studied, "If there is no dust", I realized that dust is also an indispensable thing in human life.

Let's talk about the disadvantages of dust first: dust stains our air, and it also stains our houses, walls, furniture, clothes, and the ** on our hands. They also wear down the smooth parts of the machine, obstruct the pistons of the internal combustion engine, and destroy industrial products.

More importantly, it endangers human health. Therefore, there is a saying that "always be diligent and wipe the Buddha, do not make the dust".

Dust is harmful to us, but it is also of great merit to us.

If there is no dust, strong sunlight will make it impossible to open the eyes, because the dust absorbs part of the sun's rays and scatters light around, like countless electric light sources. Sunlight passes through the dust. scattering, the intensity is greatly reduced, and thus it becomes soft.

Dust has a lot of uses. Without dust, the sky will always be blue, and everything on the ground will be wet, which will also make the natural weather disappear. If there is no dust, nature is very monotonous.

Knowing the harms and benefits of dust, it's time to understand it: dust particles are generally between one millionth of a millimeter and a few hundredths of a millimeter in diameter. The dust that can be seen by the human eye is a behemoth in the dust, and the fine dust can only be seen under an electron microscope.

The main ** of dust over land is: Industrial emissions, combustion fumes, soil dust, etc.

I hope that dust will carry forward its benefits and stop harming human beings.

Question 1: What are the benefits and disadvantages of dust? Benefits::

It allows the earth to gently obtain the sun's energy, and it can also make the atmosphere have enough condensation nuclei to increase the chances of cloud and rain formation; Regulate the temperature of the earth's surface to make it suitable for the survival and reproduction of life. If there is no dust in the atmosphere, the sunlight will not be absorbed, reflected, scattered and refracted, and the sky will be blue, without wind, snow, rain, dew, glow, and rainbow. 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.

Disadvantage: 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.

Question 2: What does the role of dust teach you? I realized that we can't judge good and evil by the superficial aspects of living things, because there are two sides to everything.

Question 3: What are the benefits of dust If there is no dust in the atmosphere, the light from the sun directly to the earth will not be absorbed, reflected, scattered and refracted, and the sky will be very blue.

Question 4: What is the main function of dust? Dust is the enemy of human health, so people especially hate it, dust with many bacteria, viruses and insect eggs flying everywhere, spreading the disease of industrial dust, fine dust can make workers suffer from a variety of difficult occupational diseases, too much dust will also cause environmental pollution, affect people's normal life and work, induce human respiratory diseases Dust on computers.

Question 5: What are the disadvantages of dust to people and what are the benefits Disadvantages: polluting the air and the environment, people inhaling too much is not good for the body.

Benefits: Won't let the sun be too dazzling, won't make the ground wet due to dust absorbing water.

Inhale all kinds of dust, get all kinds of diseases, go to all kinds of hospitals, spend all kinds of money, and promote all kinds of economic development.

Various benefits of dust.

Dust is the enemy of human health, so people especially hate it.

After reading a famous book carefully, everyone must have gained a lot, and it is time to take the time to write about the aftermath of reading. How do you write your impressions? The following is my review of "If There Is No Dust" that I have compiled for you, I hope it will be helpful to you.

If there is no dust" after reading 1

Always wipe frequently, do not let the dust stain. "Students, you must still remember the article "If there is no dust" that you learned last semester. The insignificant dust of life can have such a huge effect.

People hate dust very much, but who would have thought that life is inseparable from dust.

When I took that class last semester, it taught me a lot about the role of dust. The dust absorbs sunlight and scatters light in all directions, like countless point light sources. The sunlight is scattered by the dust, which greatly weakens its strength and softens it.

If there is no dust in the atmosphere, the strong stupid sunlight will make it impossible to open the eyes.

Gases in the atmosphere tend to scatter purple, blue, and cyan light, while the sky is blue. The reason why we see the sky gradually turns from blue to white is because of the high dust content in the air. If there were no dust in the sky, the sky would always be a monotonous azure color.

The water vapor in the air has to adhere to the dust in order to form stable water droplets that fall from the sky.

When the ground is wet, all the moisture is absorbed by the dust, and the ground will be relatively dry. If there were no dust in the air, the earth would always be wet. Due to the refraction of small water droplets, there will be thousands of scenery in nature.

Wet ground can affect the survival of living things. People stay on the wet ground for a long time, it will cause breathing difficulties, and even life-threatening, how terrible!

Seemingly insignificant dust, it turns out to have such a big effect. Now I read the lesson "If There Were No Dust", which really makes me have a lot of memories!

If there is no dust" after reading 2

When it comes to dust, people always shy away. Because dust pollutes the environment, harms environmental health, easily causes diseases, and endangers human health. People hate dust and want to be free of dust in this world.

1. Dust is a particulate suspended in the air, and dust is used in industrial emissions, combustion soot, soil dust, etc. Dust is the enemy of human health, it carries many bacteria, viruses and insect eggs everywhere and spreads diseases. Dust is also good :

The dust makes nature have a variety of natural scenery such as sunset, morning glow, idle clouds and mist, rainbow and sunset.

2. Dust is the enemy of human health, so people especially hate it, dust carries many bacteria, viruses and insect eggs flying everywhere, spreading diseases. Industrial dust and fine dust can make workers suffer from a variety of difficult job boring and cracking karmic diseases, excessive dust will also cause environmental pollution, affect people's normal life and work, and induce human respiratory diseases. Dust is very harmful to computers.

Excessive dust front cover may block the CPU fan, cause the fan to stop, cause the CPU to overheat and burn, affect the contact between each board, and may also cause corrosion of the circuit board.

3. Dust will absorb, reflect, scatter and refract the light from the sun directly to the earth, and produce wind, snow, rain, dew, glow, and rainbow. Since dust is hygroscopic particles, the water vapor in the air will condense, forming clouds in the sky of Yinqiao, and the clouds in the sky also block many harmful rays in the universe from breaking into the earth's surface.