EDTL：3165 Shirley‘s Blog

  We propose why substances have different densities, because some substances are filled with tiny pores, while others do not have or have a small number of pores inside, resulting in differences. That's why they have different densities. We also observed the diffusion rate and color range of M&M beans in water of two different colors, blue and orange. Compared to ordinary water, the use of sugar water actually seems to have a similar diffusion effect

 This week, we measured the quality, float and sink status, weight, and so on of various materials, including wood, crayons, straws, tin foil balls, and glass marbles. We drew many tables to record each item, which I found very interesting and participatory. Children will love to participate in it. I have also learned this knowledge before, but using these methods to practice also reflects the intuitive recording of various tables

  We placed two pieces of ice of the same size in an iron bowl and on a wooden board, and finally saw a rapid melting in the iron bowl, but a slow melting on the wooden board. This is because the material of the iron bowl reacts with ice, ultimately causing the ice to melt quickly. We put M&M beans in water, and the food coloring on the outer shell of M&M beans slowly disperses in the water. By moving the M&M beans in the water with our hands, we can see a more noticeable color melting. When we suck the leather strap onto the cardboard, it bounces back quickly, but when we suck it onto the table, it doesn't bounce back. Cardboard brings air. Let the air inside expand, causing rebound. We put two spoonfuls of white vinegar in a bag, and half a spoonful of baking powder in the same bag. When the baking powder comes into contact with the white vinegar, they react and start boiling, creating many bubbles and cooling. We put sugar free and normal cola in water, and in the en...

  In this experimental class, we delved into the biological concepts of gene randomness and natural selection through a series of practical activities. The experiment first involves distributing 100 red, black, and white beans of each type, and using different tools to transfer these beans into their respective cups. This process aims to simulate the random transmission of genes. Through this simple and intuitive approach, we can understand how the genetic combinations of offspring are influenced by random factors in biological genetics. In addition, the experiment also included observations of previously planted small plants. Unfortunately, these plants have all died, but their seeds have matured, providing us with a vivid example of the life cycle and biological continuity. Although plants themselves cannot survive, they still transmit life through seeds, reflecting how organisms in nature adapt to their environment in different ways to ensure the continuation of their species. I...

This class I learned mRNA (messenger RNA) plays a critical role in the process of translating genetic information from DNA into proteins, acting as a template that dictates the amino acid sequence of the protein product. Codons are sequences of three nucleotides on the mRNA molecule, each specifying a particular amino acid or a stop signal during the translation process. Understanding the relationship between mRNA and codons is fundamental in genetics and molecular biology, as it underlies the mechanism by which genes are expressed to produce proteins essential for cellular function and organism development. I learned this when I was in Middle School, It is not new for me, it is kind of review. By integrating hands-on activities and real-world applications, I can enhance students' understanding and engagement, applying the principles of mRNA functionality and codon translation to teach complex genetic concepts in a more accessible manner.

    I think this week we have gained a deeper understanding of DNA and RNA knowledge. We checked our plant and found that he has grown fruits. Although he has not yet fully grown, he already has a pod like part. I also saw the butterfly brought by the teacher. We used candy to simulate the arrangement and appearance models of DNA and RNA, which is a very interesting activity that can be used as a reference for teaching children in the future, And we finally drew the portraits of Mason and me as "daughters" by flipping coins, which was also a very interesting activity. I think it has made me more familiar with the knowledge of DNA, and also taught me how to teach children this knowledge in simple and interesting ways.