Later, with the growth of age and rich knowledge, I finally understood the mystery. The original water drop spirit hidden in clothes wanted to go to the outside world to play, so it slowly turned into wisps of steam and flew away hand in hand. So, the clothes are dry!
In summer, the weather is very hot, and the elves are so hot that they shout, "Oh, it's so hot! How hot it is! Let's find a place to spend the summer, or we'll get heatstroke! " After that, they turned into steam and flew to the shade to enjoy the cool. In this way, the clothes will soon dry! Grandma Feng came, and the elves cheered: "Take Grandma Feng's car to play!" " "with these words, they spread their wings and flew to the journey of freedom ... so, the clothes soon dried up!
Students, now, you should understand why wet clothes are dry! In fact, there are so many sciences around us, as long as you observe and think carefully, you can find them! With science, our life is more convenient and better!
Chapter 2: Popular Science On Monday afternoon, I read a book called Science in Games at home. After turning a few pages, I saw an article that could make raisins float and make them float up and down. I thought, this experiment is very interesting. Just try it. So, I have to go to work.
I found some raisins, a glass of water, a bottle of vinegar and baking soda according to the book. The experiment began. I put a few raisins into the water according to the book and immediately sank to the bottom. Then I added a spoonful of baking soda and a few drops of vinegar. Then, a miracle happened! Raisins are floating! But it just floated to the surface and sank again. But I just sank to the bottom and floated up again. It's like dancing up and down How interesting! The lovely question is: Why can raisins float up and down?
I read the book again with questions. It turns out that vinegar and baking soda can turn into carbon dioxide, produce bubbles, and attach to the surface of raisins, making them lighter and floating underwater. No sooner had the bubbles burst than the raisins sank again, collecting enough bubbles, and the raisins floated up again, jumping up and down as if they were dancing happily.
Even a small experiment has so much knowledge, so there are more things waiting for human beings to discover in nature!
Article 3: Popular Science Everyone's face is full of laughter this morning. Why is this? It turns out that today's "popular science caravan" will enter our school to carry out popular science activities.
We started, but it's a pity that we didn't go to the third grade until the 654th grade, so we had to wait in the classroom. After a long time, it was finally our turn. I took my notes and walked excitedly to the exhibition area. Wow, there are twenty-five exhibits here, such as "Seeing but not Touching", "Rolling on a Cone", "Animation", "See who can roll fast", "Rolling in a straight line", "Needle threading" and "Optical turntable". But what interests me most is the "rolled" cone. I rode a cone to the exhibition area, saw a cone in the high place, and rolled it down. I saw the cone slowly rolling to the bottom, but the cone skillfully rolled from the bottom to the top, and I thought, "Hey, how did the cone roll from the bottom to the top?" I looked at the mystery of its solution with doubts, and at first glance, all the fog was solved. It turns out that when the cone "rolls up", its center of gravity will decrease. Under the action of gravity, the center of gravity of an object will decrease. A simple measurement shows that when an object is at the high end of the orbit, its center of gravity is the lowest. "Oh, I see, this is the truth of the simple matter," I said softly. "I must study science well."
Scientific. The world is really wonderful. I must study this "endless" science.
Chapter Four: Popular Science Knowledge A few days ago, my mother took me to the supermarket for shopping. We bought drinks, snacks and a bag of eggs. On the way home, my mother asked me to get the eggs. Because the egg is too heavy, I raise it with one hand and hold it from below with the other. When I got home, my mother asked me if my egg was broken. I looked at the egg and said, "There are many broken eggs in the middle." I didn't wrestle on the road, so how did my egg break? So I asked my mom. My mother asked me, "What shape is an egg?" "It's oval." I replied. I asked my mother, "What does this have to do with broken eggs?" Mother asked me to put two eggs together. I tried for a long time, but I couldn't get them together. I can only get the eggshells of two eggs together at most. I asked my mother what this meant. My mother pointed to the contact point of two eggs and said, "The key to breaking eggs is this contact point." My mother saw me and said, "there are many contact points between eggs, but the contact area between eggs is very small." Although the contact area is small, it bears a lot of force, so the egg is broken. " Then my mother asked me to put an egg on the table and let me stick it with a pen tip. It didn't take much effort to get stuck.
There are also many scientific truths in our life, waiting for us to explore and learn!
Chapter 5: Popular Science Activities I've long heard that the Chinese Academy will hold popular science activities, and I've always wanted to feast my eyes there. On a recent day, we were lucky enough to go there under the leadership of our teacher and witnessed the elegance of the science exhibition. This is a godsend. As soon as I entered the playground, my eyes were attracted by the dazzling array of exhibits on the cube box. And me, enlarged face, animation principle, shaking hands with myself ... my favorite is enlarged face. Every time you accidentally walk past one side of the lens, the students on the other side will laugh, because this lens can enlarge your face and seems to have magical power. Standing on both sides of the lens, you will see each other's enlarged faces, just like ordinary lenses. It was fun!
Yo! Why is it so busy there? Oh, it turned out that the characters who played grandpa and sister showed us the experiment of chemical reaction. "Oh, the scorching sun, I really want to drink water!" "Sister cried." All right, I'll get you some water. "Grandpa said kindly. Grandpa took out four cups, poured boiling water into the first cup, and grandpa poured it into the second cup. How strange! Boiling water turned into refreshing milk, and milk poured into the third cup turned into delicious orange juice. What will the next cup become? I stared at the fourth cup in confusion, oh! It turns into red watermelon juice ... I see: in this world, there are many sciences and mysteries that we need to learn and solve. Only by studying hard can we apply science, understand science and let science benefit mankind.