There are physics moms everywhere in life. Why does the ball bounce? Mom, why doesn't the umbrella leak? Why does it thunder and lightning in rainy days ... I remember when I was a child, we asked our parents many meaningless questions. Every time, parents will answer them in the simplest and clearest sentences. Do you know that?/You know what? Do you know that?/You know what? At this time, parents are filled with a kind of excitement, a kind of excitement that children grow up gradually. I remember once, on a scorching afternoon, the weather was extremely sultry and the room was like a stove. My brother and I feel uneasy sitting at home, and the thermometer at home also points to 38OC. My mother said with concern, "There are cold drinks in the refrigerator. If you want to drink, go get it! " "My brother and I immediately rushed to the front of the refrigerator. As soon as we opened the refrigerator door, a fresh and cool air came to our faces. Let's take out some cans of iced drinks and put them on the table. After a while, the bottle wall was "sweating". The younger brother said, "Come and see, brother, the bottle is sweating! "! The bottle is sweating! "Dad said to us unhurriedly," This is liquefaction in physical phenomena. Because the drink has just been taken out of the refrigerator, the drink inside is ice. What should I do if the cold air is hot? " "I went to school in science class. I remember what the book said. When cold air meets heat, it will form small water droplets. Oh! It turns out that this is the case, so it is not that the bottle is sweating or that the bottle is washed. " "Then why does it feel cold when the refrigerator door is opened?" "Because cold air needs to blend into hot air, you have to absorb the heat around you, so you will feel very cool." I seemed to realize something and said, "Oh, I see!" Dad smiled happily. There is science everywhere in life, as long as we have a pair of eyes that are good at discovering it. Let's observe attentively and think hard with our spiritual eyes. Will certainly multiply their wisdom. I firmly believe that full wings will definitely make us fly higher and farther!