Principle of cultural relic weathering
The weathering of cultural relics mainly consisted of physical weathering, chemical weathering, and biological weathering. ** 1. Principles of Physical Weathering ** 1. ** Effect of temperature change ** - Cultural relics are in the natural environment for a long time. The change of temperature day and night, seasonal changes, etc. will cause the materials of cultural relics to expand and contract. For example, when the temperature rises during the day, the surface and interior of the stone cultural relics are heated unevenly. The surface temperature rises quickly and the degree of expansion is large. When the temperature drops at night, the surface quickly contracts. This repeated expansion and contraction would cause stress in the internal structure of the cultural relic. When the stress exceeded the strength limit of the material itself, it would cause cracks, peeling, and other damage to the cultural relic. 2. ** Effects of humidity changes ** - Changes in humidity would also have a physical weathering effect on cultural relics. As for some of the materials, such as wood and stone, when the humidity increased, the material would absorb water, causing the volume to expand. When the humidity decreased, the water in the material would evaporate, causing the volume to shrink. This change in volume caused by the change in humidity would also cause stress inside the cultural relic, which would cause damage to the cultural relic. - In some special environments, such as cultural relics preserved in humid caves, the humidity would be at a high level for a long time, which would dissolve the salt on the surface of the cultural relics. As the water moved, the salt would re-crystalize on the surface or inside the cultural relics. The stress generated during the crystallization process would also destroy the structure of the cultural relics. 3. ** Wind erosion effect ** - Wind was an important factor in the physical weathering of cultural relics that were exposed outdoors. The sand, dust and other particles carried by the strong wind would collide and rub against the surface of the cultural relics. Under long-term effect, the patterns and coating on the surface of the cultural relics would be worn away, causing the cultural relics to lose their original appearance and some historical information. ** 2. Principle of chemical weathering ** 1. ** Oxidation ** - Many cultural relics will undergo an oxidization reaction when they come into contact with oxygen in the air. For example, the iron in the metal cultural relics would undergo electro-chemical corrosion in an environment of oxygen and water. The iron atoms would lose their electrons and turn into iron ions, which would be further oxided into iron ions, forming rust. The loose structure of rust would accelerate the damage of metal relics. - Some of the components in organic cultural relics, such as the fiber in paper, the protein in silk, etc., would also undergo a slow oxidization reaction under the conditions of oxygen and light in the air, resulting in aging, color change, and strength reduction of the material. 2. ** Acid and Alkaline Corrosion ** - The acidic or basic substances in the environment where the cultural relics are located will corrode the cultural relics. For example, in areas with serious industrial pollution, acidic gases such as sulfur dioxide and nitrogen dioxide in the atmosphere would form acid rain when they met water. Acid rain would erode stone relics and metal relics. The limestone in the stone cultural relics would react with the acid in the acid rain, causing the surface of the stone to be corroded and become rough and loose. - Alkaline substances in the preservation environment of some cultural relics, such as the alkaline salt in the soil, may also corrode the cultural relics and destroy the structure and composition of the cultural relics. ** 3. Principle of Biological Weathering ** 1. ** The influence of algae ** - When algae grew on the surface of cultural relics, there were organic acid substances in its metabolism. These acid substances would decompose the stone material, increase the water dissolution of the stone material, accelerate the migration speed of salt, and make the surface of the stone cultural relics appear powdered. The existence of algae also provided conditions for the growth of moss, lichen, and other plants, further accelerating the destruction of cultural relics. 2. ** The influence of fungi ** - Fungi did not have any chopstick, so they could not produce nutrients from sunlight. Instead, they used the substances left on the surface of the stone artifacts as a source of nutrients. Different types of fungi could secrete different types of acid, which could separate the calcium, calcium, and iron ions from the surface of the stone artifacts and corrode the stone. 3. ** The influence of lichen ** - Lichen was a symbiotic combination of fungi and algae. When lichen grew on cultural relics, it would also have a weathering effect on cultural relics. Its growth would change the physical and chemical properties of the surface of the cultural relic and affect the structural stability of the cultural relic. Read more exciting novels for free
Zhao Lusi was the earliest
Zhao Lusi first entered the public eye in 2016 as a mid-level agent to participate in the recording of the variety show " Mars Intelligence Agency Season 2." Then, in 2017, she entered the entertainment industry by participating in the historical romance drama " Feng Qiuhuang." While waiting for the TV series, he could also read the exciting content related to this site!
When was Su Rongqing reborn in the year of Hua?
Su Rongqing was reborn slightly later than the male and female leads, about a month before Li Rong and Pei Wenxuan's wedding. While waiting for the TV series, he could also read the exciting content related to this site!
Qing Yu Nian, Teng Zi Jing's wife and children died?
In Joy of Life, Teng Zijing's wife and children did not die. After Teng Zijing passed away, his son was taken in as Fan Xian's disciple, and the lives of the mother and son improved.
Health Nail Cutting Teaching Plan Middle Class
The following is a lesson plan for healthy nail trimming in the middle class: ##1. Activity Target 1. Let the children know the harm of long nails to their bodies and companions, and develop good hygiene habits of cutting nails frequently. 2. Help children understand the correct way to cut nails. ##2. Event preparation 1. Pictures or videos about bacteria affecting health. 2. There are a few nail clipper. ##3. Activity ###(1) Introduction 1. The teacher guided the children to observe their little hands and asked,"Children, look at what's on our little hands?" Is there anything hidden under your fingernails?" 2. Let the children observe the length and cleanliness of each other's nails. ###(2) Basic Part 1. Show pictures or videos of bacteria affecting health and guide children to discuss the dangers of growing nails. - Question: "Children, long nails can easily scratch the skin. Why is the scratched skin red and swollen?" - [Explanation: There are a lot of bacteria hidden under your fingernails. When you scratch someone or yourself, the bacteria will enter the wound, causing the skin to become red and swollen.] 2. A small experiment: Put the cut nails under a magnifying glass to observe (the teacher prepared the magnifying equipment and the cut nail samples in advance), so that the child could directly see the dirty things under the nails. 3. Ask a health care doctor (if possible) or a teacher to explain the harm caused by the bacteria hidden in the nails entering the human body through various channels, such as getting sick and having a stomachache. 4. Demonstrate the correct way to cut nails: - The teacher took out a nail clipper and showed it to the children."Children, this is a nail clipper. We use it to cut our nails." - As he demonstrated, he explained,"We need to cut the nails horizontally. Don't cut the sides into a circular arc, but leave two corners. Don't cut the entire nail too short, just slightly above the nail gap. Finally, polish the two corners to prevent the nails from growing into the flesh and avoid injury." - Ask the children to follow suit and cut their nails. ###(3) Game 1. I Can Cut My Nails Game - The teacher gave each child a model nail clipper (plastic, safe). - The teacher recited a children's song: "Nail clipper, open your mouth, bite your nails and don't let go. Little hands, come and help, press down hard on the broken nails. Dirty things, show them. Don't forget to clean them." The child mimicked the action of cutting his nails with the rhythm of the children's song. ###(4) End 1. The teacher concluded,"Children, today we learned that there are many dangers to growing nails. We also learned the correct way to cut nails. In the future, we must cut our nails frequently and be healthy and good children." 2. Children should be encouraged to cut their nails properly with the help of their parents. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
It's like a wolf novel with big wings
The Big Bad Wolf with Wings mostly wrote modern urban romance novels, with common elements such as overlord, sweet pet, and ancient style. The following novels had similar styles: - Gu Zao Ba Zong Wen: This kind of novel often has the image of a domineering and affectionate male lead, such as the role setting of a CEO. There are various emotional entanglements between the male lead and the female lead. The common plot is to take and plunder, sweet pet interaction, etc. For example, her own works such as " Blooming " and " Then, Love Will Be Easy." - [Modern urban romance novels: A novel that is set in a modern city and describing the love story between a man and a woman. It will involve some business war plots and rich story content. The characters will be distinct and unique, such as her works such as " Who's Waiting Coincidentally for Flowers to Bloom ".] If you like the style of The Big Bad Wolf with Wings, you can try to find some works of ancient romance authors from the same period. These works may have similarities in style, plot setting, character creation, and so on. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Rebound 6 pounds during the weight loss plateau period
There were many reasons for the weight loss to rebound by 6 pounds after entering the plateau period. First of all, during the plateau period, the body would adapt. The food consumed might be better absorbed, which would bring more calories. At the same time, the body's basic metabolism would gradually decrease, resulting in a heat imbalance. If you give up your weight loss plan at this stage and don't pay attention to diet control, it will easily cause weight rebound. Secondly, the lack of exercise intensity during weight loss could also cause this situation. For example, if you need to exercise for more than 30 minutes to effectively burn fat, but only exercise for 10 minutes a day, the fat loss effect is not good, and your weight may rise. In addition, irregular work and rest would also affect the weight loss effect. Staying up late during weight loss would make the weight loss effect worse, which would lead to an increase in weight. In order to avoid weight rebound during the plateau period, it was recommended to further adhere to reasonable and balanced nutrition, as well as moderate intensity cardiovascular exercise, eat more fresh vegetables and fruits containing vitamins and fiber, and strictly prohibit the intake of high-calories, high-fat, and spicy foods. At the same time, he could adjust his weight loss plan, such as changing the way he exercised. He could change from running at a constant speed to running at a variable speed, or to skipping rope, HiIT, and other sports. He could also add strength training, such as deep squats, deadlift, push-ups, etc., to help maintain muscle mass and increase the body's metabolism rate, thus breaking through the plateau period. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflection and Evaluation on the Teaching Plan of Dandelion Painting in Middle Class
In the middle class art dandelion painting lesson plan, there were the following aspects that could be reflected and evaluated: ** I. Achievement of teaching objectives ** 1. ** Knowledge and Skills ** - From the teaching plan, one of the goals was to let the children try to use the rubbing combination method to express the basic parts and main characteristics of the dandelion. In the actual teaching process, most of the children could master the rubbing method to draw the main part of the dandelion after the teacher's demonstration, such as using a brush dipped in paint to copy the shape of the dandelion. However, some children might have difficulties in describing details such as dandelion stems and scattered seeds, and they might need more guidance from teachers. This meant that the basic parts of the knowledge and skills goals could be achieved, but the details were a challenge for the middle class children. 2. ** Emotions, attitudes and values ** - As for the goal of experiencing the joy of rubbing and painting and developing children's artistic creativity and expressiveness, during the process of children's creation, many children showed curiosity and interest in rubbing and actively participated in the creation. This indicated that the goal of stimulating children's interest in painting was achieved. However, when the children cooperated to draw the drifting dandelions, some children's cooperative consciousness was not strong, reflecting that there was still room for improvement in cultivating children's cooperative spirit through painting activities. ** 2. Teaching content ** 1. ** Selection of content and adaptability of children ** - Choosing dandelions as the painting object was more suitable for middle school children. Dandelions were plants that children might have come into contact with in their daily lives. Their appearance and characteristics were relatively obvious, and they were easy for children to recognize and understand. They could stimulate children's interest in painting. 2. ** Depth and breadth of content ** - In terms of the depth of the teaching content, it was reasonable for the middle class children to focus on the shape of the dandelion. However, the integration of related knowledge such as the growth process of dandelion could be more in-depth. For example, more interesting content such as the spread of dandelion seeds could be added to enrich the teaching content and expand the knowledge of children. ** 3. Teaching methods and strategies ** 1. ** Demonstrating Explanation Method ** - During the demonstration, the teacher could clearly show how to use the tools, such as how to use a brush to dip the dandelion in paint and how to draw the stem with a crayon. However, the demonstration might not have taken into account the child's concentration time. If the demonstration process was too long, the child might be distracted. 2. ** Co-op Learning Method ** - The design of this cooperative learning method was positive when guiding the children to cooperate and draw the drifting dandelions. However, in actual practice, children's awareness of cooperation was not strong. It might be because teachers did not emphasize the importance and methods of cooperation in the early guidance, resulting in children's confusion in cooperation. ** 4. Teaching process ** 1. ** Introduction Stage ** - Through the introduction of conversation, asking the child if he had seen dandelions could arouse the child's thoughts and interest. However, if they could combine some more vivid dandelion objects or multi-media materials (such as animations), it might attract the attention of children and stimulate their learning enthusiasm. 2. ** Observation segment ** - It was necessary for children to watch pictures and videos of dandelions to observe their shape and growth process. However, the video was incomplete, which affected the child's comprehensive understanding of the dandelion growth process. This might affect the child's subsequent creative inspiration to a certain extent. 3. ** Creation segment ** - In the process of children's creation, teachers playing "Dandelion" music helped to create a relaxed creative atmosphere. It was very important for the teacher to observe and guide them, but if the teacher could give more individual guidance and give timely feedback to different children's drawing skills and problems, it might make the children's creative effect better. 4. ** Evaluation Stage ** - In the process of evaluating works, if the children could participate more in the evaluation, such as letting the children share their thoughts and feelings about painting dandelions with each other, instead of just being evaluated by the teacher, it could better cultivate the children's language expression ability and aesthetic ability. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The male lead is an Asian German football novel
At present, only " Torres's Me at the Start, To Revive German Football " was found. The main character of the novel was a Chinese teenager, and it was related to German football. However, the main character was not an Asian German football novel. Sorry, I can't accurately recommend it. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What's the name of the novel about the three daughters of the prehistoric nanny
There were some stories in which the main character had three daughters, such as " Primal: Headache! Three Fox Demon Daughters Love to Cause Trouble, etc. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The finale of a good interstellar technology novel
Here are some good interstellar technology novels: - "The Era of Ultra-Dimensional Technology" was written by the three people from Lingnan. This is a science fiction novel that advocates that technological civilization drives individual progress. From the planet to the starry sky, from the starry universe to the three-dimensional world, and then to the four-dimensional space-time, the plot was smooth and reasonable, and the development of the story was reasonable. The imagination of the future of science and technology was in line with reality, and it also wrote about the impact and promotion of scientific and technological development on the entire world. The wonderful part of the book lay in the parts after leaving Earth. For example, starting from the elimination of the human traitor Martian base and the asteroid belt base that relied on the alien civilization (the remains of the civilization), the idea of interstellar civilization was very interesting. 1.74 million words. - [I'm Not A Human Anymore [Starcraft]]: Author: Wu Long Bai Tao. Completed. Word Count: 895,300.] This was the story of the female protagonist's growth. The female protagonist was born in the midst of thorns but pursued freedom. She was forced by fate to wander but did not change her mind. In the end, she stepped onto the throne of glory with her companions. - The author was the White Crane of the Sky, one of the pioneers of interstellar literature. The story was about the main character visiting a museum and obtaining the inheritance of a necromancer, which allowed him to roam the galaxy. He used the new variant of the undead mechanical army to attack the sea of undead. It was the perfect combination of machinery and the undead. - "Interstellar Cruise" by Gu Jianfeng, an interstellar sci-fi classic. The crew could rely on the interstellar cruise ship to speed up their cultivation, and the leveling of the interstellar cruise ship would be focused on the captain and crew's occupations. The cooperation of the two could also use shocking powerful moves to help the main character team turn the corner in times of crisis. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>