Questions and answers on popular science knowledge 1. Some unpopular scientific knowledge.

1. Why does sorbet get angry?

The reason why sorbet bubbles is because there is a lot of invisible water vapor in the outside air. When it comes to cold sorbet, it will liquefy into droplets when it is cold. It seems that the sorbet is bubbling.

2. Why do sunflowers always face the sun?

Sunflower stems contain a wonderful auxin. This auxin is very afraid of light. When it is illuminated, it will go to the backlight side, and the cells on the backlight side will multiply rapidly. Therefore, the backlit side will grow faster than the bright side, which will bend the sunflower to light.

3. Why do cicadas shed their skin?

Cicada's shell (exoskeleton) is hard and can't expand with the growth of cicada. When the cicada grows to a certain stage, the cicada's exoskeleton restricts its growth, and the cicada loses its original exoskeleton, which is cicada slough.

4. How do bees make honey?

Bees spit the collected sweet flower juice into an empty beehive. At night, they suck sweet juice into their honey stomachs to make it, and then spit it out and swallow it. It takes 65,438+000 ~ 240 times to make sweet honey.

5, hanging on the wall of the quartz clock, when the battery runs out and stops, its second hand often stops at the "9" position on the dial. This is because the second hand is most hindered by the large torque at the "9" position. Scientific common sense

6. Sometimes, when tap water flows from the adjacent faucet, it occasionally makes bursts of noise. This is because the water pipe vibrates when the water rushes out of the tap.

7. When taking pictures on TV, turn off the camera flash and indoor lighting to make the picture clearer. Because the reflected light of the flash lamp and the illuminating lamp on the TV screen will interfere with the transmitted light of the TV picture.

8. At the same temperature, frozen meat thaws faster in water than in air. At the same temperature, hot nails cool faster in water than in air. A cup filled with boiling water cools faster when immersed in water than when immersed in air at the same temperature. All these phenomena show that water has better heat transfer performance than air,

9. When there is cold water in the pot, the water droplets attached to the outer surface of the pot bottom can only be dried up after a long time on the flame, and will only boil when it is dried up. This is because the water droplets, the pot and the water in the pot keep heat conduction, and the temperature is almost the same. As long as the water in the pot is not boiled, the water droplets will not boil, and the water droplets will evaporate on the flame and be gradually dried up.

10, out-of-shape mirror, the farther away from the mirror, the more out of shape. Because the image in the mirror is formed by the reflection of the silver-plated surface behind the mirror, uneven silver-plated surface or uneven glass thickness will lead to aliasing. The farther away from the deformed mirror, the more the reflected light on the silver-plated surface deviates from the normal position according to the principle of light amplification, and the more deformed the mirror is.

2. Who knows the most unpopular scientific paper?

Science composition model essay 1: Why is the trunk round? In the process of observing nature, I happened to find that the shape of the trunk is almost round-an empty cone.

Why is the trunk conical? What are the benefits of a conical trunk? In order to discuss these problems, I made more in-depth observation and analysis. With the help of my tutor, I consulted relevant materials and learned that the stems of plants have the functions of supporting plants and transporting water and other nutrients.

The stems of trees are mainly composed of vascular bundles. The supporting function of stem is mainly borne by wood fibers in xylem. Although the stems of woody plants will become thicker year by year, in a certain time range, the number of woody fibers in the stems is certain, that is, the cross-sectional area of the stems is certain.

Then, based on the assumption that the cross section of the trunk grows into different shapes, we design experiments to explore the reasons and advantages of conical trunk. Through experiments, we find that when the cross-sectional area and length of (1) are fixed, the vertical supporting force of triangular columnar objects is the largest and the lateral bearing capacity is the smallest; The vertical supporting force of cylindrical objects is not as good as that of triangular cylindrical objects, but the lateral bearing force is the largest; (2) For trunks with the same mass and different shapes, the short conical trunk bears the largest wind force; (3) Wind is a natural phenomenon, which affects the cross-sectional shape and height of trees.

The approximate cone-shaped trunk has a low center of gravity, and the huge root system is connected with the earth, so the center of gravity drops lower and the stability is greater; (4) The cross section of the trunk is round, which can reduce the damage, has stronger mechanical strength and can resist the wind attack. At the same time, under the action of the wind, the bending degree of the trunk is similar everywhere. No matter which direction the wind blows, the resistance of the trunk is similar, and the trunk is not easy to be damaged.

The above experiments reflect the laws of nature, and nature enlightens us: (1) A columnar object with a triangular cross section has the greatest vertical supporting force, and its shape can be used in buildings, such as angle steel; (2) A circular object with a circular cross section has the largest lateral bearing capacity, and similar building materials can be found everywhere, such as TV towers and telephone poles. In the process of observation, experiment and analysis, I gradually explained and revealed the mystery of conical trunk, increased my knowledge, and combined my knowledge with practice, which not only consolidated my knowledge, but also improved my interest in learning, and initially learned the scientific observation and analysis methods.

Fan Wen 2: Why do leather shoes shine brighter and brighter? Every Sunday, I always finish the task of shoeshine given to me by my mother. Tell you, this is the source of my pocket money for a week! After getting the leather shoes covered with dust, I first wipe off the dust on the vamp, then apply shoe polish and wipe them carefully, and the leather shoes will become bright and beautiful.

But why is this? I found two pairs of old and new leather shoes of the same brand and style for comparative observation. I first touched the uppers of two pairs of leather shoes and found that the surface of the new shoes was much smoother than the old ones.

Old leather shoes are coated with shoe polish. After careful polishing, it shines a lot, but it is still not as good as new leather shoes. Is there a relationship between the brightness of leather shoes and the smoothness of uppers? I brought a pair of old leather shoes that were not polished, and the uppers were uneven under the magnifying glass.

Then, I circled two rough areas A and B on the leather shoes. Carefully wipe area A with shoe polish, and area B without shoe polish as a blank control. I found that the surface of area A is obviously smoother after wiping, and it is more shiny than area B when placed in the sun.

Why is there such a big difference between them? I think the teacher once said in physics class that the wall of the theater is uneven, so that most of the sound can be absorbed and the audience will not be disturbed by the echo. Similarly, light will be reflected on the surface of any object. If the plane is uneven, light will scatter in all directions. If this plane is smooth, then we can see the reflected light in a certain direction.

The surface of leather shoes is not absolutely smooth. If it is an old leather shoe, its surface is of course more uneven and can't reflect light in a certain direction, so it looks dull. There are some small particles in shoe polish, which can just be filled into the pits on the surface of leather shoes when shining shoes.

If you wipe it with a cloth again, the shoe polish will be more uniform, the surface of leather shoes will become smooth and flat, and the reflective ability will be strengthened. Through the experiment, I finally know the secret of shoes getting brighter and brighter! Model essay 3: What effect does vinegar have on flowers? Vinegar is a common condiment in life, while flowers can purify the ecological environment and beautify our life.

Have you ever thought about the relationship between vinegar and flowers? We explored the subject with curiosity. According to people who have rich experience in planting flowers, applying some vinegar on potted flowers can improve the growth of potted flowers and increase flowers, which are bright and leafy.

We soon confirmed this in the experiment. Do different concentrations of vinegar have different effects on flowers? This is the second stage of our experiment.

We select four pots of gypsophila paniculata, primrose and Chinese rose with the same growth and divide them into four groups. Each group (three pots) has three kinds of flowers, which are numbered and labeled respectively. At the same time, we prepared edible white vinegar into three solutions with different concentrations: 1%(pH 2~3), 0.0 1%(pH ≈4) and 0.000 1%(pH ≈6), and sprayed vinegar on three groups of potted flowers once a day, while the fourth group did not.

Observe and record the growth of flowers every five days. The results of this experiment are as follows: spraying low concentration vinegar (pH ≈6) has no obvious effect on these flowers; The flowers sprayed with moderate concentration of vinegar (pH ≈4) are obviously better than other groups, with more buds, earlier flowering, richer colors and longer flowering period. Spraying high concentration vinegar with pH value of 2-3 will make the flowers wither prematurely.

Through this experiment, we can tell you that spraying vinegar properly when planting flowers can make flowers grow better. But to master the concentration of vinegar, excessive acetic acid will harm flowers.

3. Do you have any unpopular tips to share?

1. Look at your zipper. If there are three letters YKK on it, it means that it is the product of Yoshida Industrial Co., Ltd., the largest zipper manufacturer in the world. 40% of McDonald's profits come from the sale of Happy Meals. 3. 1996 Webster's dictionary has 3 15 spelling mistakes. 4. On average, 12 newborns are given to the wrong parents every day. 5. Chocolate is for dogs. It is fatal, and it only takes a few ounces to kill a puppy because of heart and nervous system damage. 6.65438+ In 1930s, tomato sauce was sold as a medicine. 7. Da Vinci could write with one hand. At the same time, he painted with his other hand. 8. Scissors were invented by Da Vinci. 9. It took Leonardo da Vinci 65,438+00 years to draw the lips of the Mona Lisa. 65,438+00. The Oscar prizes awarded during World War II were all made of wood, because metal was a scarce material at that time. There are no clocks in casinos in Las Vegas. 65,438+02. Bruce Lee moves too fast to see clearly. Therefore, when we are filming, we have to slow down the speed of the film. Lie on your back and lift your legs slowly to avoid falling into quicksand. 14. Mosquito repellent water does not repel mosquitoes, but interferes with the sensory organs of mosquitoes, making them unable to find people. 15. The dentist suggested that the toothbrush should be placed at least 6 feet away from the bathroom. Avoid all kinds of particles 16 floating in the air when flushing the toilet. The earliest product with bar code was Wrigley Gum 17. Michael Jordan earns more money from Nike every year than the total wages of Nike factory workers in Malaysia 18. Marilyn Monroe has six fingers on one foot 19. Hitler's mother once considered abortion. However, it was discouraged by the doctor. 20. People will lose 40 pounds of skin in their lifetime. 2 1. If you are accidentally bitten by a crocodile, you will poke it in the eye. It will let you go. 22. People can fall asleep in an average of 7 minutes. 23. In the Philippines, yo-yo was used as a weapon. 24. Cats are the only domestic animals that are not mentioned in the Bible. 25. Rubber bands can be better stored in cold storage. 26.56% of keyboard input is done by the left hand. "Dream" is the only English word ending in "mt". 28. Even without a head, cockroaches can still live 10 days. 29. I can't keep my eyes open when sneezing. 30. Mexico City sinks by 65,438+00 inches every year. The brain is more active when sleeping than when watching TV. 32.80% of Americans like blue best. There are more chickens than people on this planet. 34. Thumb nails grow slowest. The fingernails of the middle finger grow fastest. 35. In Washington, DC, there are more telephones than people. The total assets of the poorest countries are not as good as those of the three richest families in the world. 37. The first boss of Marlboro Cigarette Company died of lung cancer. 38. Smart people's hair contains more zinc and copper. 39. The youngest parents in the world are 19 10 China children aged 8 and 9.

But the nose and ears have been growing 465,438+0. Sleeping consumes more calories than watching TV. 42. People will die if they don't sleep for about 10 days. 43. Chewing gum when cutting onions won't make them cry. 43. The Mona Lisa has no eyebrows. 44. If the moon is just above your head, you will lose a little weight. 45. alexander bell, who invented the telephone, never called his mother or wife. Because they are all deaf. 47. "I am." It is the shortest complete sentence in English. 48. Like fingerprints, everyone's tongue lines are different. 49. "Bookkeeper" is the only word in English whose letter is repeated three times in a row. 50. Right-handed people live an average of nine years longer than left-handed people. 5 1. "The quick brown fox jumps over the lazy dog" uses all the letters in English. 52. If all China people line up, the line will never end because of the high birth rate. 53. The number of people using English in China is 54 more than that in the United States. * * Every square inch of skin contains 20 feet of blood vessels. 55. People use the toilet six times a day on average. 56. A baby has 300 bones at birth, and only 206 bones after birth. 57. Beard is the fastest growing hair. If a person never repairs his face, he will grow a 30-foot beard all his life. 58. Which came first, the chicken or the egg? According to Genesis 1:20-22, there was a chicken first. 59. The longest place name still in use today is:-,a hill in New Zealand. 60. If you leave Tokyo by plane at 7: 00 in the morning, when you arrive in Honolulu, it will be 4: 30 yesterday afternoon, 6 1. Scientists at the Park Observatory in Australia believe that they have received information from outside the earth. I found that the radio waves actually came from a microwave oven in the Observatory. 62. Wearing earplugs for an hour will increase the number of bacteria in your ears by 700 times. 63. A French kiss can exchange more than 40,000 kinds of parasites and 250 kinds of bacteria. 64. Men have better eyesight than women. Women have better hearing than men. 65. Coca-Cola was originally green. 66. The most common name in the world is * * * * 67. If you don't count "North" and "South", in English, the initials of seven states are the same. On average, every American has two credit cards. 69. "Typewriter" is the longest English word that can be written with a single-line key on a QWERTY keyboard. 70. Blind women are twice as many as men. 7 1. People don't suffocate. 72. When sneezing, the heart will stop beating about 1 millisecond. 73. Pigs can't see the sky. "Six sick chiefs are sick" is the most tongue twister in English. 75. Sneezing too hard will crack your ribs. Trying to resist sneezing will rupture the blood vessels in the neck or skull, which will be fatal. 76. Each suit of K in playing cards represents a great king in history: King David in spades, Alexander the Great in clubs, Charlemagne in hearts, and Julius Caesar 77.6438+0438+0438+0 in diamonds, 1 15438+0. 1 1 1x 1 1， 1 1， 1 1 1 1 = 65438+。 If the horse flies on all fours, then the man will die in the battle. 79. As above, if a horse's front foot is raised, then the person is seriously injured in the battle. 80. As above, if all four feet of a horse land on the ground, then the person dies of natural causes. 8 1. Honey will not go bad. 82. Crocodiles can't stick out their tongues. Snails can sleep for three years. 84. All polar bears are left-handed.

4. Cold knowledge: 12 Very interesting unpopular knowledge. Do you know the tenth one?

There are a lot of unknown cold knowledge in life, which is easy to be ignored. Let's take a look at these interesting cold knowledge. There must be something you don't know! After reading these cold knowledge again, I found myself much smarter!

1, according to statistics, more people are killed by donkeys than plane crashes every year (Xiao Lv? Unable to verify, please answer)

2. Carrier, the inventor of air conditioner, is called "the father of refrigeration", but the air conditioner was originally designed for machines to prevent the printing ink from being unbalanced.

3, do not sleep in winter, do not sleep in summer;

Don't drink coffee or strong tea when you are tired. Otherwise, it will do great harm to the cardiovascular system, and palpitation is one of the manifestations of this symptom.

5. Endless coke bottles can be put upside down, so it is not easy to leak.

6. Have a sense of humor. Robert Provine, an American physiologist, said that keeping humor can improve the level of immune cells.

7. "Go topless" is an organization for American women to fight for equal rights, claiming that women also have the right to breasts in public.

8. The commonly used method to test a person's computing ability in neurology physical examination is: 100 minus 7? What about MINUS 7 degrees? If it is difficult to answer this way, it means that there may be problems in this regard.

9. The ancestors of domestic cats are supposed to be desert cats originated in ancient Egypt and Persian cats in Persia, which have been domesticated by humans for 3507 years (but not completely domesticated like dogs).

10, sesame oil is more suitable for middle-aged and elderly people.

1 1. scallops from Brittany peninsula (northwest France) should be transported to China for cleaning before being sent back to France for cooking.

12, take a closer look at the shape of the super Mary grass and the shape of the cloud.

5. Kneel for a quick question and answer database about popular science.

Compilation of popular science knowledge on food safety 1. What are the principles of food safety supervision and management in China at present? In accordance with the principle of one supervision link and one department supervision, the food safety supervision function is further rationalized and the responsibilities are clearly defined by means of subsection supervision and variety supervision.

2. What is the responsibility of local people at all levels for food safety supervision? The State Council's Decision on Further Strengthening Food Safety requires the responsibility of "strengthening local food safety supervision". Local people at all levels * * * take overall responsibility for local food safety, unified leadership and coordination of local food safety supervision and rectification work.

3.* * * What are the responsibilities of the main food supervision departments? Quality and technical supervision department is the main functional department responsible for food production and processing supervision; The industrial and commercial department is responsible for food circulation supervision; The health department is responsible for the supervision of consumption links such as restaurants and canteens; The food and drug supervision department shall be responsible for the comprehensive supervision, organization and coordination of food safety and the organization and investigation of major accidents. 4. Which industries in China are the first to carry out the pilot construction of food safety credit system? Meat, grain and children's food industries.

5. What specific requirements does the state have for the environmental conditions of pollution-free agricultural products? The production environment meets the requirements of environmental standards for pollution-free agricultural products, with clear regional scope and certain production scale. 6. What is the applicable subject of the food quality and safety market access system? The applicable subjects of the market access system for food quality and safety are all citizens, legal persons or other organizations engaged in food production and processing and whose products are sold in China.

7. What are the three main contents of "QS"? The first is to implement the production license system for food production enterprises. Second, the food produced by enterprises shall be subject to compulsory inspection system. Third, implement the quality and safety market access labeling system for foods that implement the food production license system. 8. To ensure product quality and safety, what are the requirements of food production and processing enterprises for raw materials? Raw and auxiliary materials used in food production and processing must conform to the corresponding national standards, industry standards and relevant regulations, and non-food raw and auxiliary materials shall not be used to produce food. The water directly used for food production and processing must meet the requirements of GB5749 "Hygienic Standard for Drinking Water".

9. Which vinegar products are subject to food production license management? Fermented vinegar and blended vinegar. Vinegar is not within the scope of certification.

10, what are the prohibited items stipulated by the state? Animal and plant pathogens (including strains, viruses, etc. ), pests and other pests, animal carcasses and soil. 1 1. What are the contents of food labels? Food name, ingredient list, net content and solid content, factory name, batch number, date marking, etc.

12. What must be marked on the products with limited use? The production date, safe use period or expiration date 13 should be clearly marked in a prominent position. Which department is responsible for the registration and approval of health food? The State Food and Drug Administration of the United States is in charge of the registration and management of health foods throughout the country, and is responsible for the examination and approval of health foods. 14. under what circumstances should the approval number of health food advertisements be revoked? The health food approval certificate has been revoked; Health food is ordered by the relevant state departments to stop production and sales; The advertisement review failed.

15, How are the accidents classified in the emergency plan for major food safety accidents? It is divided into special major food safety accidents (Grade I), major food safety accidents (Grade II), major food safety accidents (Grade III) and general food safety accidents (Grade IV). 16. How to confirm a major food safety accident (Grade III)? In any of the following circumstances, it is a major food safety accident: (1) The scope of the accident involves two or more county-level administrative regions within the municipal (prefecture) level administrative region, which brings serious harm to people's food safety; (2) More than 100 people were injured or died; (3) major food safety accidents recognized by the people at the city (prefecture) level.

17. At present, how many kinds of food are subject to "QS" market access system by AQSIQ? 28 categories. They are five categories: wheat flour, rice, edible vegetable oil, soy sauce and vinegar; New categories 10: meat products, dairy products, beverages, condiments (sugar, monosodium glutamate), instant noodles, biscuits, canned food, frozen drinks, puffed food and quick-frozen rice noodles; New 13 categories: candy products, tea, wine, beer, yellow wine, pickles, candied fruit, roasted seeds and nuts products, egg products, cocoa products, roasted coffee, processed aquatic products, starch and starch products.

18. What are the top ten junk foods in the world announced by the World Health Organization (WHO)? Fried food, pickled food, processed meat food, biscuit food (excluding low-temperature baking and graham crackers), soda cola food, convenience food (mainly referring to instant noodles and puffed food), canned food (including fish and fruit), preserved plum food, frozen dessert food and barbecue food. 19. What are the main chemical pollution problems of inferior children's food? The abuse of food additives is the main problem of chemical pollution of inferior children's food.

20. What do you mean by "three noes" food? Food without factory name and address, factory certificate and shelf life. 2 1. What are the eating habits that hinder the development of teenagers? Quantitative diet, partial eclipse, eating high-sugar high-salt high-fat food, obsessed with fast food, eating tonics indiscriminately.

22. What are the main heavy metal pollution that affects food safety? Mainly lead, mercury and cadmium. 23. Which of the following characters must be used for imported food sold in China's domestic market? China people.

24. What are the three major carcinogens in food recognized by the world? Where does it mainly exist? Benzopyrene, nitramine and aflatoxin are all recognized as the three carcinogens in food in the world. Among them, benzopyrene pollution mainly occurs in smoked and baked foods, and benzopyrene also exists in some fried foods such as French fries, biscuits, roast pork and brown crispy fruit desserts. Nitramine mainly comes from nitrite and nitrate added in meat and its products; Aflatoxin mostly exists in moldy corn. 25. What are the "four killers" in unsafe food? Sodium bicarbonate, hydrogen peroxide, formaldehyde and sulfur.

26. How to drink milk scientifically? Drinking a bag of milk must be boiled before drinking; It is best to eat with steamed bread, bread, corn porridge and beans; Not suitable.

6. Popular science knowledge materials

Dust is annoying to everyone, and it is harmful to the environment? Health is harmful to human health.

Therefore, throughout the ages, people have always been "diligent, not dusty." However, have you ever thought that human beings can't live without dust?

If there is really no dust in nature, what kind of situation will we face? The diameter of dust particles is generally between one ten thousandth and one millionth of a millimeter. The dust that the human eye can see is a giant in the dust, and the tiny dust can only be seen under a high-power microscope.

The main sources of dust are soil and rocks. After weathering, they split into fine particles.

These particles float in the air with other organic particles. They absorb some sunlight and reflect it around, just like countless point light sources.

The sunlight is greatly weakened by the reflection of dust, so it becomes soft. If there is no dust in the atmosphere, strong sunlight will make people unable to open their eyes.

Interestingly, dust particles also have a "strange temper", which tends to reflect purple, blue and cyan light with shorter wavelengths, and "likes" to absorb other colors with longer wavelengths. The sky we see on the ground is blue because of the high dust content in the lower atmosphere.

If there were no dust in the atmosphere, the sky would be white. Most dust is hygroscopic.

Water vapor in the air must adhere to dust to condense into small water droplets. In this way, when the water vapor in the air reaches saturation, the dispersed water vapor will adhere? Dust forms stable water droplets that can float in the air for a long time.

If there is no dust in the air, everything on the ground will be wet. What's more, there can be no clouds in the sky, and it is impossible to form rain and snow to adjust the climate, so it is impossible for water evaporated from the ground to return to the ground.

If there is less and less water on the earth and it dries up completely, living things can't survive. In addition, due to the refraction of sunlight by these water droplets, there will be colorful natural scenery such as sunset glow, idle clouds and rainbow halo from Zhao Hui.

If there were no dust in the air, how monotonous nature would be! The role of dust tells us that everything has its two sides, even some things that people regard as "waste" often have its existence value that cannot be ignored. Only by correctly understanding them can we seek advantages and avoid disadvantages and benefit mankind.

Is it this or the fine dry powder of soil or other substances below; Something reduced to tiny parts; Fine powder. Dust is the enemy of human health, so people especially hate it, because it carries many bacteria, viruses and eggs everywhere and spreads diseases.

Industrial dust and fiber dust can make workers suffer from various incurable occupational diseases. Excessive dust will also cause environmental pollution, affect people's normal life and work, and induce human respiratory diseases. However, the contribution of dust can never be erased.

If there is no dust in the atmosphere, sunlight will not be absorbed, reflected, scattered and refracted, and the sky will be either too bright or too dark. Because dust is a hygroscopic particle, without its core, water vapor in the air can't condense and clouds in the sky can't form. Without the cover of clouds, the surface will become dry and barren, and the weather will be either too hot or too cold.

Without dust, many harmful rays in the universe will break into the earth's surface without hindrance, posing a fatal threat to human beings and all kinds of creatures. Although Dust has many shortcomings, its contribution is endless. It can make the earth get solar energy gently, and it can also make enough condensation nuclei in the atmosphere, increasing the chances of cloud and rain formation. Adjust the surface temperature to make it suitable for the survival and reproduction of life.

7. What popular science knowledge materials are there?

Popular science knowledge can be divided into natural science, social science and thinking science according to different research objects.

1. Natural science is a specific scientific about natural phenomena, which studies nature and its laws.

Such as mathematics, physics, chemistry, astronomy, geography, biology and so on.

2. Social science is a specific scientific of social phenomena, trying to reveal the essence and laws of society.

For example, economics, politics, military science, sociology, management, education and so on.

3. The humanities is a specific scientific of human cultural phenomena, which tries to reveal the essence and laws of social and cultural fields.

Such as linguistics, history, archaeology, ethics, aesthetics, religion and so on.

Popularization of scientific knowledge, also known as popular science or popular science, refers to the activities of introducing natural science and social science knowledge to the general public, promoting the application of science and technology, advocating scientific methods, spreading scientific ideas, carrying forward scientific spirit and making the public understand, accept and participate in it in an easy-to-understand way. Popular science is a kind of social education.