What are some natural phenomena that are difficult to achieve or observe in the laboratory?

The most difficult thing to observe in the laboratory is the formation of the rainbow, because the journey of the rainbow requires light and water content in the air, including many different factors to cause the rainbow, so it is difficult to simulate the rainbow, the formation process and the formation of the rainbow in the laboratory. This natural phenomenon is very magical, but it is difficult to simulate. <>

There are many natural phenomena that are difficult to observe in the laboratory, such as the aurora phenomenon is very difficult to do, because the aurora phenomenon is a phenomenon caused by many factors and chemical reactions, so it is impossible to do it in the laboratory, this phenomenon is basically in the North Pole, or the South Pole can be seen, this is a typical example, in the laboratory can not be done at all.

I think it's difficult to achieve in the laboratory, or it's difficult to observe natural phenomena, maybe it's about an environment without resistance, everyone may know that if a ball doesn't work hard, talk about it, it will keep moving, so this situation can't be fully understood, because many things can't eliminate resistance, at most let the resistance decrease.

The natural phenomena that are difficult to realize or observe in the laboratory are those related to natural life, because I think that the laboratory is a closed environment after all, and some natural phenomena cannot be displayed indoors at all, so they cannot be observed indoors. <>

For example, we now have many miracles, or many phenomena that cannot be explained by science or proven. Therefore, it is difficult for some laboratories to pay attention to many astronomical phenomena, such as some stellar planets, which we cannot see, because our telescopes cannot see that far.

There are natural phenomena that are difficult to achieve or observe in the laboratory, such as meteors. It is difficult to achieve in the laboratory, and it is difficult to observe, this is a natural phenomenon, because the meteor is too fast, and the laboratory has no way to catch the popular specific substance, and he has no way to study it, so this is a natural phenomenon that cannot be realized and observed in the laboratory.

Phenomena that are difficult to observe in the laboratory include the strange Northern Lights phenomenon, the migration and raid of social animals, and then there's the restaurant for baby pandas and monkey jumps. The crocodile pounced on it. Of course, there are also some non-human natural phenomena that cannot be observed.

For example, whether or not an accident appears, and the mysterious death of some birds, are all natural phenomena that are difficult to observe.

What is more exaggerated is all large-scale processes, such as the inability of the laboratory to complete the formation of the universe, the formation and extinction of black holes, the evolution of stars, the evolution of organisms, the Poincaré reappearance of thermodynamic systems, and so on. Not to exaggerate, it is not possible to complete the operation of gravitational waves in the laboratory (generation, detection, modulation, etc.) at this stage.

In fact, there are many natural phenomena observed in the laboratory, which make people feel very wonderful, for example, some researchers have said that they have observed some surface lines on the moon, I think this is quite magical, and it also brings us more levels of exploration, let us deeply dissect some of the mysteries of this world and even this universe. <>

In the experiment, we observed that if a set of mung bean seeds with soil germinated, and a group without soil did not germinate, we could verify the guess that "mung bean seeds must be in the soil to germinate".

Experimentation refers to one of the basic methods of scientific research. According to the purpose of scientific research, we should exclude the influence of the outside world as much as possible, highlight the main factors and use some special instruments and equipment, and artificially change, control or simulate the research object, so that some things (or processes) can occur or reproduce, so as to understand natural phenomena, natural nature, and natural laws.

Scientific research generally refers to a series of activities such as investigation, research, experiment, and analysis of the intrinsic nature and laws of related problems by using scientific research experiments and analysis to provide a theoretical basis for the creation and invention of new products and technologies, or to obtain new inventions, new technologies, and new products. The basic task of scientific research is to explore, understand the unknown and innovate.

With the enhancement of China's Xiangran scientific research strength and the continuous optimization of the scientific research environment, the international attractiveness of China's scientific research is also getting stronger and stronger. According to a report by Japan**, China's academic influence is growing stronger, and the relaxed and stable academic environment has attracted more and more young Japanese scholars to choose to develop in China.

According to the "Science and Technology Indicators 2022" report released by the National Institute for Science and Technology Policy of Japan, from 2018 to 2020, China ranked first in the world in the number of publications in global science and engineering journals. During the same period, China also ranked among the highest in the world in terms of the number of citations in such publications. Japan's ranking is on a downward trend.

Summary. 1) To prove whether light has an effect on soybean seed germination, the only variable should be: light A and B have this condition, but the result is: after a period of time, most of the seeds in the two cups of A and B germinate, indicating that the germination of seeds does not need light or light has no effect on seed germination

2) To prove whether air has an effect on seed germination, the only variable should be: air A, B, and C, in addition to A and B, A and C can be used as control experiments But the result is: After a period of time, most of the seeds in cup A germinate, and the seeds in cup C do not germinate The conclusion that can be drawn from this group of experiments is:

The germination of seeds requires sufficient air or air has an effect on seed germination

3) It is not difficult to see from the experimental step 2 and the diagram that 30 soybean seeds should not be randomly placed on the napkins at the bottom of cups A, B, and C, and 10 soybeans should be placed on A, B, and C

So the answer is: (1) light; Light is not required for seed germination or light has no effect on seed germination

2）a、c；Air; The germination of seeds requires sufficient air or air has an effect on seed germination

3) 30 soybean seeds should not be randomly placed in cups A, B, and C, but should put 10 soybeans on top of A, B, and C.

What phenomena we observed in experiments can verify our **.

Hello, I have seen your question and am sorting out the answer, please wait a while

This can be verified when it is observed to be similar to you, or it can be verified if it is diametrically opposed to you.

Seed germination experiments discuss the answers.

1) To prove whether light has an effect on soybean seed germination, the only variable should be: light A and B have this condition but the result is: after a period of time, most of the seeds in the two cups of A and B germinate It means that the germination of seeds does not need light or light has no effect on seed germination (Sideshow 2) To prove whether air has an effect on seed germination, the only old starting variable should be:

In air A, B, and C, in addition to A and B, A and C can be used as control experiments But the result is: after a period of time, most of the seeds in cup A germinate, and the seeds in cup C do not germinate The conclusion that can be drawn from this group of experiments is that the germination of seeds requires sufficient air or air has an effect on seed germination (3) It is not difficult for us to see from the experimental steps 2 and the diagram:

30 soybean seeds should not be randomly placed on the napkin at the bottom of cups A, B, and C, and 10 soybeans should be placed on A, B, and C Therefore, the answer is: (1) light; Light is not required for seed germination or light has no effect on seed germination (2)a, c; Air; Seed germination needs sufficient air or air has an effect on seed germination (3) 30 soybean seeds should not be randomly placed in cups A, B, and C, and 10 soybeans should be placed on A, B, and C.

1. When Watt saw steam, he associated: use the power generated by steam to replace manpower, so he invented the steam engine.

2. Lu Ban's hand was injured by weeds, and he invented a saw instead of an axe to cut trees.

Dear: That's right. Laboratory observations can reduce the chain of external interference by controlling environmental factors, making the results more accurate and reliable. However, simulating natural situations in the laboratory can sometimes be unreal or incomplete, which may lead to discrepancies between the actual situation and the experimental results.

Therefore, the shed beam needs to be operated with caution when observing in the laboratory, and try to simulate the real environment to ensure the accuracy of the experimental results.

The formation of matter in nature is a complex process that involves multiple factors such as the combination of matter, chemical reactions, and physical changes. In the scientific community, there are various theories and hypotheses to explain the process of matter formation, but there is no fully proven standard model.

However, simulations can provide some speculation about the formation of matter in nature. For example, chemical reactions, nuclear reactions, or high-energy particle collisions can be used in the laboratory to simulate the process of matter formation in nature.

One of the most well-known simulation experiments is the Large Hadron Collider (LHC), an experimental facility built by the European Organization for Nuclear Research (CERN). LHC uses two high-energy beams colliding to produce very high energy and density, thus simulating the conditions of the Great Universe. These high-energy collisions lead to the creation of new elementary particles, such as quarks and leptons, which eventually form more complex structures of matter such as atoms and molecules.

In addition, chemical experiments can also simulate the process of matter formation in nature. For example, by synthesizing the organic molecule Yuzaochun in the laboratory, it is possible to study how these molecules are formed. At the same time, it is also possible to study how these molecules can be combined into more complex compounds under specific conditions, leading to a better understanding of the origin of life in nature.

In summary, simulation experiments provide a way to explore the formation of matter in nature, through which some reasons and mechanisms of matter formation can be inferred, which provides valuable clues for understanding the natural world.

Experimental science is based on a common understanding of man and nature. （）

a.That's right. b.Mistake.

Zhengyun Ant did answer the big stool case: b

c, silver nitrate solution drops into sodium chloride.

AgCl is generated, white precipitate.

d, sodium sulfate solution drops into barium carbonate.

Because barium carbonate itself is a precipitate, adding sodium sulfate does not react, and there is no phenomenon.

Both are more stable salts and are not particularly acidic or alkaline. Both barium carbonate and barium sulfate have similar precipitation phenomena and will not have more obvious reaction phenomena.

Sodium sulfate and barium carbonate react to produce barium sulfate or white solid is not obvious.

。。。Because barium carbonate is already precipitated...