Elementary school science, inheritance and variation, education, essay, enlightenment and harvest
In the process of teaching genetics and variation in primary school science, it could bring many insights and gains. From a teaching point of view, this topic was challenging because the concept was relatively abstract. However, by carefully preparing materials, making coursewares, using a large number of pictures and video materials, and organizing students to observe and compare the similarities and differences of similar plants, it could effectively resolve teaching difficulties and cultivate students 'ability to observe, compare, analyze, collect and process information. At the same time, the teaching sessions should be designed reasonably. For example, the introduction session would use photo matching games to arouse students 'interest, and the new lesson would allow students to investigate the similarities and differences between themselves and their families. These activities would help students better understand the concepts of inheritance and variation. However, it was also necessary to pay attention to the shortcomings of the teaching. For example, in emphasizing the important role of genetic variation in the continuation of plant life and population reproduction, there may be cases where the explanation was not deep enough. From a student's perspective, this topic would help improve their scientific literacy. After the previous science courses, although the students had the ability to explore, they still needed to learn more about the relatively complicated knowledge of genetics and mutation. In the learning process, students could recognize these two laws of the biological world, and through the comparison of their own characteristics with their family members, they could intuitively feel the embodiment of inheritance and variation in humans, and then think about the existence of animals and plants. This not only allowed students to have a deeper understanding of biological science knowledge, but it also guided them to form preliminary scientific concepts and grasp the subject ability corresponding to their cognitive level. From there, they could explain natural phenomena or solve simple practical problems. In addition, during the entire teaching and learning process, students could also experience that scientific exploration was a continuous process. Like Mendel and Yuan Longping's research in the field of genetics and mutation, their stories could stimulate students 'interest in science, cultivate the spirit of exploration and scientific attitude, and promote students' understanding of the nature of science. Read more exciting novels for free
Elementary school science, genetics and variation, education, essay, teaching plan, reflection
The following is an example of a reflection lesson plan on genetics and variation in primary school science: ** I. Achievement of teaching objectives ** 1. ** Knowledge target ** - In terms of imparting the concepts of inheritance and variation, through the observation and comparison of plant or animal parents and offspring, students can understand the phenomenon of similarity (inheritance) and differences (variation) between offspring and parents. For example, when explaining the inheritance and variation of plants, the students would use the plants in the campus, such as roses and hibiscus, to observe the similarities and differences in flower color, number of petals, flower shape, color, size, shape, etc. The students could better grasp the inheritance and variation of these characteristics reflected by the parents and descendants of plants. However, for some abstract concepts, such as "mutation is the basis of biological evolution", it might be difficult for students to understand, and more examples were needed to help them understand. 2. ** Exploring Ability Target ** - In terms of inquiry activities, if students were asked to compare the similarities and differences between the offspring of dogs and their parents, students could use observation and comparison methods to find similarities and differences in terms of fur color, shape, and so on. However, in the information search section, the students 'ability to find more information about animal or plant genetic variation was uneven. Some students lacked effective search strategies and the ability to filter information. 3. ** Attitudes, responsibilities, goals ** - In order to realize the connection between genetics and mutation and human life, students could have a certain understanding by guiding students to think about the examples of humans using the genetics and mutation of plants to improve their lives. However, they could further enhance the depth of teaching in this area, such as guiding students to explore specific applications in medicine, agriculture, and other fields. ** 2. The effectiveness of teaching methods ** 1. ** Observation and comparison method ** - Observation and comparison methods were widely used in teaching, such as comparing the similarities and differences between the offspring of plants and their parents. This method could directly let students discover the phenomenon of inheritance and variation, and it was very effective. However, during the observation process, the observation and guidance of some subtle characteristics were not detailed enough, causing some students to overlook some important hereditary or mutated characteristics. 2. ** Teamwork Method ** - Group work played a positive role in discussing the similarities and differences between plant offspring and their parents, as well as filling in the record forms. Students could brainstorm in the group. However, there were also some problems in group cooperation. For example, the division of labor in some groups was not clear, resulting in individual students leading the discussion while other students did not participate much. 3. ** Instance Teaching Method ** - Using examples, such as the famine in the Netherlands and the epigenetic imprint of mice, could help students better understand abstract concepts of inheritance and variation. However, in the selection of examples, they could also combine more common things in the students 'lives to enhance the students' familiarity and understanding. ** 3. Organization and arrangement of teaching content ** 1. ** Difficulty Level of the content ** - The difficulty level of the overall teaching content was basically appropriate. The inheritance and variation of plants and animals gradually unfolded, which was in line with the students 'cognitive laws. However, for some complicated content, such as epigenetics, the depth of the explanation at the primary school level needed to be carefully grasped to prevent students from confusion. 2. ** The continuity of the content ** - In terms of the cohesiveness of the teaching content, from focus to exploration, discussion, and expansion, the transition of each link was relatively natural. However, in the expansion section, the connection with the main content of the classroom could be closer. For example, when students observed the inheritance and mutation of animals after class, they could give more clear observation guidance and hints related to classroom knowledge. ** IV. Class interaction and student participation ** 1. ** Teacher and student interaction ** - The teacher-student interaction in the classroom was relatively good. The teacher guided the students to think about the phenomenon of inheritance and variation through questions. However, in the process of interaction, the feedback to the students could be more diverse. In addition to simple affirmation and supplement, it could also guide the students to further think or explore. 2. ** Student participation ** - Most students were able to actively participate in classroom activities, but there were still a few students who were less involved. In the future teaching, he needed to pay attention to this group of students and adopt individual questions, group adjustments, and other methods to increase their participation. ** 5. Modification measures ** 1. ** Concept Comprehension Enhancement ** - For abstract concepts, add more examples, models, or animations to help students understand them better. For example, making animations about the transmission of genetic material, showing the process of gene transmission between parents and offspring, so as to deepen students 'understanding of the nature of genetic variation. 2. ** Exploring Ability Cultivation ** - In terms of data access, courses were specially arranged to teach students how to effectively search and filter scientific data, such as the skills of using search engines and the methods to judge the reliability of data. At the same time, in the exploration activities, the division of labor in the group was further clarified, and detailed rules of group cooperation were formulated to ensure that every student could actively participate. 3. ** Teaching content optimization ** - The difficulty and cohesiveness of the teaching content would be further optimized. For complex concepts, simplify the explanation or adjust the depth of the explanation. In terms of content continuity, strengthen the connection between the expansion link and the main content of the classroom, so that the entire teaching content forms an organic whole. 4. ** Class interaction improvements ** - In the teacher-student interaction, enrich the feedback methods of students 'answers, such as using questioning, group discussion and evaluation. For students with low participation, design special interaction sessions, such as letting them share their observations in their lives, to increase their participation in the classroom. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school mathematics teaching labor education essay
It has many meanings and values to permeate labor education into primary school mathematics teaching. * * I. Strategy of integrating labor education and mathematics teaching ** 1. * * Infiltrating labor ideology with the help of daily mathematics culture ** - Life was the source of mathematics, which contained rich labor culture elements. For example, when teaching mathematics, they could introduce shopping scenes to let students understand that the price calculation and change of goods were the results of the salesperson's labor. This would not only allow students to learn mathematics knowledge, but it would also make them realize the embodiment of labor in their lives, thus permeating the idea of labor. 2. * * Mining Realistic Mathematics Materials to Increase Labor Efficiency'** - Digging mathematical materials from real life, such as area calculation in construction projects, material estimation, etc. When students learned this mathematical knowledge, they could think of the labor of construction workers, which required precise mathematical calculations to improve efficiency. Teachers could guide students to think. If the calculations were not accurate, it would lead to problems such as waste of materials or delays in construction. This would help students understand the importance of mathematics in labor and encourage them to pay attention to efficiency in future labor. 3. * * Carry out practical mathematics activities and create new labor skills ** - They could organize mathematics practice activities, such as measuring the area of the campus or the height of the trees on the campus. In this process, students needed to use mathematical knowledge to measure and calculate, which was similar to the labor content of land surveying or forest workers. Through such activities, students could create new labor skills, such as learning how to measure the area of irregular shapes more accurately. * * II. The specific implementation of labor education from the perspective of disciplines ** 1. * * Dig into the labor education resources in the teaching materials ** - In primary school mathematics textbooks, the creation of situations and practice could be related to labor education. For example, the agricultural planting problems in the textbook, such as calculating the yield and spacing of crops planted on a piece of land, could let students understand the application of mathematical knowledge in agricultural labor. By making the situation increase in value due to labor, students could have a deeper understanding of agricultural labor while learning mathematics knowledge. They could make the practice shine because of labor, such as the mathematical exercises on the processing of parts in industrial production, so that students could understand that industrial labor could not be separated from mathematics. 2. * * Activity embedding elements to enhance labor education ** - In the process of learning and exploration, let the discovery and learning be solid because of labor. For example, when learning geometry, students could be guided to observe the structure of buildings in their lives. These buildings were the result of the labor of construction workers and the practical application of geometry. Class communication was colorful because of labor. When students shared the connection between mathematics and labor that they had observed in their lives, it could enrich the content of classroom communication and enhance students 'understanding of the relationship between labor and mathematics. 3. * * Diverse participation to strengthen labor education guidance ** - Peer-to-peer cooperation occurred due to labor. In mathematics group activities, such as making mathematical models, the members of the group cooperated with each other, which was similar to teamwork in some manual labor. Home-school cooperation was sublimated by labor. Parents could guide their children to apply mathematics knowledge to housework at home, such as calculating household utility bills, food consumption, etc. The school and family worked together to strengthen the guidance of labor education for their children. * * III. Problems and Thoughts on Labor Education in Primary School Mathematics Teaching ** 1. * * Problems ** - At present, the labor education materials in primary school mathematics textbooks were lacking in the content of labor in the new era. For example, there was less coverage of modern science and technology labor and Internet-related labor. This could lead to a lack of understanding of the application of mathematics in modern forms of labor. 2. * * Thoughts for improvement ** - Teachers needed to pay attention to social development and supplement labor education materials in addition to teaching materials in a timely manner. For example, the introduction of mathematical knowledge in big data statistics to let students understand the importance of mathematics in modern information labor. At the same time, it could also guide students to think about the mathematical principles of artificial intelligence algorithms and expand their horizons on the relationship between labor and mathematics. The labor education in primary school mathematics teaching needed teachers to start from many aspects and integrate labor education with mathematics knowledge teaching in order to improve students 'comprehensive quality and understanding of labor value. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
In which book is high school biology inheritance and variation in?
In the 2019 edition of the People's Education Press, the biology high school compulsory book," Inheritance and Evolution," there was content about inheritance and variation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
School of Elementary Education, WU
There were primary education colleges in the city, such as the college of technology, the college of software engineering, the college of railway, and the college of transportation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Enlightenment and Harvest
In the sixth chapter of the Doctrine of the Meanings, it is mentioned that Shun was a man of great wisdom. He liked to ask questions and was good at observing people's words. He concealed evil and promoted good. He was good at both. From this chapter, one could gain the following insights and gains: ** 1. Wisdom in dealing with people ** 1. ** Humble, studious and good at thinking ** - Shun was inquisitive and observant, which showed a humble attitude. In life, no matter what position you are in, you should not be complacent and actively seek advice from others. At the same time, he analyzed the seemingly ordinary and shallow words around him and dug out the meaning behind them. This reminded people to maintain a studious heart and have keen insight. They were good at obtaining valuable information from daily trifles and simple words of others. 2. ** Forgiveness and positive attitude ** - Hiding evil and promoting good was a very positive attitude. In interpersonal relationships, instead of publicizing other people's shortcomings, praise other people's strengths to create harmonious interpersonal relationships. This kind of attitude was not to cover up the problem, but to guide others in a better direction in a positive way without intensifying the conflict. For example, in a team, paying more attention to the strengths of the members and praising them would motivate the members to play to their strengths instead of focusing on their weaknesses. It would also be beneficial to the team's cohesion and enthusiasm. 3. ** Balance and moderation ** - Grasp both ends of the law and use it among the people. This showed a kind of wisdom of weighing. When faced with different perspectives, opinions, or situations, one could grasp the two extremes and then find a moderate solution. In social life, whether it was dealing with family conflicts, disputes at work, or social public affairs, one should not go to extremes. Instead, one should find a balance point that takes into account the interests of all parties and conforms to the interests of the majority. ** 2. Regarding moral cultivation ** 1. ** Self-restraint and tolerance ** - Shun could still practice the practice of concealing evil and promoting good in the face of the malicious treatment of his family. This required a strong self-restraint ability. In terms of moral cultivation, this was a very high realm. When faced with the unkindness of others, being able to restrain one's feelings of revenge or resentment and treat them with a tolerant attitude was a kind of improvement to one's moral character. 2. ** Uphold the moral code ** - In his family relationship, even though Shun was abused, he still insisted on filial piety and fraternal love. This kind of persistence in moral standards in a harsh environment was worth learning. It told people that moral cultivation was not only reflected in good times, but in adversity, it could test a person's moral bottom line. No matter what the external environment was, they had to stick to the basic moral norms. ** 3. From a leadership perspective ** 1. ** Good at employing people and governing ** - When Shun appointed talents, he appointed nine people recommended by his countrymen to different positions. He also stipulated that the achievements of the people would be examined once every three years, and the results of the examination would determine the promotion and promotion. This reflected a scientific concept of employment and management. When leading an organization or team, one must be good at discovering the strengths of talents and appointing them reasonably. At the same time, an effective assessment mechanism must be established to ensure the efficient operation of the team. 2. ** Balance the interests of all parties ** - Using the golden mean when governing the people was actually balancing the interests of all parties. As a leader, he had to consider the needs and interests of different groups. He couldn't be biased towards one side. By adopting appropriate policies and measures, he could make the entire society or organization reach a harmonious and stable state of development. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Learning the dangers of elementary school, and then reflecting on the harvest
The harm of elementary kindergarten was mainly reflected in the following aspects: ** 1. Harm to the child ** 1. ** Difficult to adapt ** - The cognitive ability, attention, and self-control of children in early childhood were very different from that of primary school students. Children who are exposed to primary school knowledge too early may feel confused and frustrated. For example, they may find it difficult to understand complex mathematical concepts or concentrate on learning knowledge such as Pinyin for a long time. - This early discomfort may extend to the subsequent stages of learning, causing children to face more learning difficulties when they enter primary school. 2. ** Losing interest and confidence in learning ** - Primary school learning methods were usually boring and boring, which was contrary to the nature of children to learn through games and exploration. For example, too much emphasis on memorizing elementary school textbooks would make children feel that learning was a burden and lose interest in learning. - Once a child experienced multiple failures or found learning boring in kindergarten, their enthusiasm for learning would be severely affected after entering primary school, and their self-confidence would also be damaged. 3. ** Affects physical and mental health ** - Children in early childhood were at a stage of rapid physical development. For example, the small muscles of the hands of older children were not mature enough. Writing too early would damage the bones and muscles, and incorrect sitting posture could also cause a hunchback. - In terms of psychology, excessive academic pressure may cause children to become anxious and depressed. For example, to complete a large number of primary school homework tasks, the child's psychological endurance was limited, and long-term stress could easily lead to psychological problems. ** 2. A violation of the nature of education ** 1. ** Violating the rules of education ** - The goal of kindergarten education was to stimulate children's curiosity and creativity through games, stories, crafts, and other activities, and to cultivate comprehensive qualities. For example, children could practice social skills and language skills in games. - Primary education focused on imparting knowledge and exam results, ignoring the development of children's personality and interest. This kind of eagerness for quick success and instant benefits could not really improve the children's learning ability. Instead, it would affect their future learning and development. ** 3. Reflection on Harvest ** 1. ** Reflection on Parents ** - Parents should realize that every child has their own pace of growth. They should not blindly follow the trend and pursue their children's accumulation of knowledge. It is not advisable to actively cooperate with the primary school teaching of the kindergarten or enroll their children in too many tutoring classes for fear that their children will lose at the starting line. - Parents should focus on cultivating their children's good habits, moral cultivation, and social skills. They should respect their children's growth patterns and should not place too much emphasis on early knowledge learning results. 2. ** Reflection on the Education ** - The kindergarten teachers had to change their educational concepts and improve their professionalism. They could not simply teach primary school content in advance. Instead, they should design colorful games and activities suitable for children so that children could learn and grow up happily. - The education department should strengthen supervision and strictly regulate the school-running behavior of the kindergarten, ensure that the kindergarten carries out teaching according to the rules of early childhood education, and put an end to the flooding of the kindergarten as a whole. In short, after understanding the dangers of elementary kindergarten, both parents and instructors should actively adjust their concepts and behaviors, so that early childhood education can return to its proper nature and create a healthy and happy environment for children to grow up. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school ferryman education method
Here are some ferryman education methods for primary school students: 1. ** Personalized Attention **: Just like how Zhang Mingfa of the Xingzhou rehabilitation center treats autistic children, respect each primary school student as a unique individual and develop a customized education plan by understanding their characteristics. For example, when taking over a new class, they could use a method similar to the way Teacher Han Jianxia sent a survey to the students to quickly grasp the students 'personalities, problems, learning conditions, etc., so as to provide targeted education methods for each student. 2. ** Guide self-awareness **: Guide primary school students to be aware of the pressure they are under. They can write in a diary," the summary of the incident, their own thoughts and feelings, and the results of their own response to this matter " to train their self-awareness. 3. ** Decision-making ability training **: When faced with a problem, guide the primary school student to think and make a decision by asking," Is this matter important to me? Are my thoughts and feelings appropriate? Could this situation change for the better? After weighing the pros and cons and everyone's needs, is it worth it for me to take action to change the current situation?" They needed to understand that making a decision was nothing more than taking action to change the current situation, or changing their own thoughts and feelings to overcome the pressure they were facing. 4. ** Overcoming Bad Feelings **: If the answer to any of the above decision-making questions is "No", the primary school student can overcome the bad feelings by persuading himself, stopping thinking, distracting himself, relaxing, and meditating. 5. Problem-solving Skills Teaching: Teach elementary school students the skills to solve problems. The five steps of identifying the problem, listing all possible solutions, making choices, implementing the plan, and evaluating the results can help them deal with most of the difficult problems in life. 6. [Correct opinion guidance: Inform primary school students that their opinions should be based on the premise of not violating others and not harming the interests of others. Their actions should be appropriate.] 7. ** Dare to say "no"**: Let primary school students understand that when they are unwilling, they have to be brave enough to say "no". When facing friends and family, they can think twice before saying "no", answer concisely, and say "no" clearly. 8. ** Equal Communication and Emotional Contribution **: Teachers should be like Teacher Han Jianxia, truly integrate with the students, insist on equal communication with the students, give their true feelings, and treat the students with their hearts. 9. ** Power of role models and habit cultivation **: Just like Teacher Han Jianxia in class, the teacher should pass on the correct learning habits and thinking methods to the students. For example, teach them how to clear their thoughts, dismantle complicated things into simple things, let the students learn to present what they think, learn to communicate and express, learn to think actively, and learn to find themselves. At the same time, through the integration of social and current affairs into the classroom, students were guided to establish correct values and outlook on life. 10. ** Diverse activities **: You can organize activities such as debates, speech competitions, poetry recitals, etc. to protect and develop the students 'personalities, to let the students' enthusiasm and talents flow fully, and to give students the opportunity to improve their abilities and display their talents. 11. [Rule Awareness Cultivation: Education must be disciplined. The rules of the class must be clearly told to the primary school students in advance so that they know what to do and avoid making mistakes.] <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to write a model essay on the future education path of an elementary school English teacher
" The Future of Elementary English Teachers " I. The updating of educational concepts In the context of the new era, primary school English teachers must first constantly update their educational philosophy. The traditional teacher-centered teaching philosophy was gradually changing to student-centered. In the future, primary school English education should focus more on cultivating students 'comprehensive language skills, not just the teaching of grammar and vocabulary. Teachers should recognize that every student is a unique learner, respect the individual differences of students, and adopt a customized teaching method to meet the learning needs of different students. For example, modern educational technology could be used to analyze students 'learning progress and learning style, and develop a unique learning plan for each student. Second, the innovation of teaching methods 1. Integration of modern educational technology With the rapid development of science and technology, primary school English teachers should master and use modern educational technology. For example, the use of multi-media teaching software to create a lively and interesting teaching situation, so that students can experience the English culture. Through tools such as an electronic whiteboard and an online learning platform, students 'participation in the classroom could be increased, and a hybrid online and offline teaching model could be realized. For example, teachers could use online game competitions in the classroom to consolidate students 'memory of words and sentence patterns. After class, they could arrange online homework to provide timely feedback on students' learning. 2. interdisciplinary teaching English teaching should not exist in isolation. In the future, primary school English teachers could try to teach across subjects. Combining English with music, art, science, and other subjects would make English learning more diverse. For example, when teaching English songs, they would explain music knowledge and cultural background at the same time. When teaching English stories, they would guide students to create art works according to the story. This would not only improve the students 'English level, but also cultivate their comprehensive qualities. Third, the improvement of professionalism 1. Continuous English learning The English level of a primary school English teacher has a vital impact on the quality of teaching. Teachers should constantly improve their English listening, speaking, reading and writing skills, and regularly participate in English training and academic exchange activities. Pay attention to the development of the English language, such as the usage of new vocabulary and popular words, so that they can be better taught to students. For example, teachers could participate in international English education conferences, exchange teaching experiences with foreign education experts, and learn the latest English teaching methods. 2. In-depth study of educational psychology Understanding the students 'psychological characteristics is the key to improving the teaching effect. Teachers should study educational psychology in depth and master the learning psychology and cognitive laws of students of different ages. According to these rules, the teaching strategy should be adjusted to stimulate the students 'interest and motivation in learning. For example, teachers could design short-term, high-intensity teaching activities to improve classroom efficiency. IV. Course Design and Evaluation 1. Personalized curriculum design In the future, the design of the primary school English curriculum would be more customized. In addition to following the national curriculum standards, teachers could add teaching content with local characteristics or school-based characteristics according to the actual situation and needs of local students. For example, by integrating local folk cultural elements into the English course, students could introduce local scenic spots, historical sites, traditional festivals, etc. in English to enhance their cultural confidence. 2. diversified evaluation system Establishing a diverse evaluation system was an important way to measure students 'learning achievements. In addition to the traditional exam results, teachers had to pay attention to students 'classroom performance, team cooperation ability, project completion, and other aspects. It uses a combination of teacher evaluation, student self-evaluation, student mutual evaluation and other evaluation methods to comprehensively and objectively evaluate students 'English learning situation. For example, in an English team project, the teacher could evaluate the students based on their role in the project, the quality of the task, teamwork, and so on. At the same time, the students could evaluate themselves and each other. Fifth, the deepening of home-school cooperation Primary school English teachers should further deepen home-school cooperation. Regularly communicate with parents about the students 'learning situation and provide parents with methods and suggestions for tutoring students at home. For example, teachers could introduce the importance of English learning, learning methods, and learning resources to parents through parent-teacher conferences and parent WeChat groups. They could encourage parents to create an English learning atmosphere at home, such as watching English cartoons together, reading English picture books, etc., so as to form a joint effort between home and school education and jointly promote students 'English learning. In short, the future education path of primary school English teachers is full of opportunities and challenges. Teachers need to constantly learn, innovation, and explore to adapt to the needs of the development of education in the new era and lay a solid foundation for students 'English learning and growth. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school Hebei education edition fourth grade second volume science
The second volume of the fourth grade science edition of the elementary school edition covered a lot of content. The teaching materials include courses such as "The Changing World" to let students realize that everything in the world is changing, such as natural phenomena (wind, rain, etc.), the growth and development of living things. These changes could be classified from different perspectives, such as life changes and material changes, or irreversible and irreversible changes. It also introduced various methods to record changes, such as table recording method, bar diagram method, etc. There was also information about the weather. For example, in the course "Various Weather", the weather included rain, fog, snow, sunny, cloudy, and many other elements. The weather sometimes affected people's mood. People could get weather information in many ways, such as watching the weather forecast on TV, making inquiries by telephone, and so on. At the same time, it also mentioned the proverb of predicting the weather. In addition, it also involved the knowledge of solid, liquid, and gas, such as the knowledge of small light bulbs. Small light bulbs were composed of glass bubbles, metal threads, etc. The two ends of the lamp inside the glass bubble were connected to the metal frame, and there were also connection points for connecting the circuit inside. The lamp was energized and emitted heat. The glass bubble was usually vacuum or filled with a specific protective gas. He also explained the knowledge related to circuits. Dry batteries provided electricity, and there were positive and negative poles. The current flowed from the positive pole through the electrical appliances and then returned to the negative pole to form a circuit. He had to pay attention to avoid short circuits. In some experiments, it would also involve the exploration of various connection methods to light up the light bulb. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Fifth grade elementary school, Jiangsu education edition, science cloud and fog
Clouds were visible suspended bodies formed by the condensation or sublimation of water vapor in the air. They were composed of a large number of small water droplets, supercooled water droplets, ice crystals, or a mixture of them. Its formation condition was that the air was rapidly pushed up by the ascending airflow. The air pressure was low, and the air expansion consumed heat, causing the temperature to drop (the temperature dropped by about 1 ° C for every 100 meters of dry air rise). As the temperature dropped, the water vapor became saturated. The water vapor attached to the condensation nucleus and condensed into cloud droplets. A large number of cloud droplets combined together and were suspended in the air by the ascending airflow to form clouds. Fog and clouds were actually the same thing, but they were in different locations. The fog was close to the observer's position, and the clouds were far away from the observer's position. On the mountain, it was often difficult to distinguish between clouds and fog. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>