1. A 500 word essay on first salt making experience
Hello! I experienced many firsts, the first time I stood on the podium, the first time I was criticized by a teacher, and the first time I was late for school.
But what I still remember most is the first time I cooked! I remember that day, I came home and found the house was empty, and my stomach was already singing "Empty City Strategy". I searched the house and found nothing delicious, just a few vegetables on the floor. So I decided to make something myself to fill my stomach first! what to do? After much thought, I decided to make scrambled eggs with tomatoes.
I was excited about my “genius” idea. I followed my mother's example and first carefully selected four large round eggs and a tomato from the refrigerator.ator.
I found a bowl and hit the egg on it. However, the egg was still full belly and not broken at all. It seemed as if he was proudly telling me: “Humph, you want. to hit me? No way ! » “So I hit the egg hard against the bowl again. I didn't expect the egg juice to splash all over me. It's so easy to watch my mom do this, but it's so hard when it's my turn! After cleaning, I tried cracking an egg again with moderate force, ah, it worked! I break the eggs one by one into the bowl. Then cut the tomatoes, stir in the eggs and sprinkle with green onions and salt.
I lit the fire and poured the oil. After the oil pan made a "sizzling" noise, I poured the egg fluid from a distance, I was scared to death, fearing the oil would do it. burst into my hands. So far, so good! It’s okay, no problem! My palms are sweaty.
I breathed a sigh of relief! After a while, small milky white bubbles appeared around the eggs. I turned the eggs over, then poured in the tomatoes and fried them for a while. A dish had just come out of the oven, and I was eating it, I was eating the dish that had been prepared after a lot of work.
My mind is filled with scenes of my mother cooking. How difficult it is for my mother.
2. How to write an essay on "Magic Salt Water"Magic Salt Water As soon as the class was in class today, Professor Zhou carefully took out a well-wrapped item from a bag. it was a beaker, an egg, a bag of salt, a wooden chopstick and a spoon. I can't help but wonder: should I do an experiment today? As I expected, I was going to do a little experiment with eggs floating in salt water. However, I raised a small question mark: generally runny eggst as soon as they are put in the water. Could it be that this salt water has some magic? power? ? ah! The wonderful experience begins! Teacher Zhou asked me to take a glass of water first, and then put the heavy eggs into the clean water. The eggs immediately sank to the bottom of the water. Then Professor Zhou added four spoons of salt to the clean water. was now cloudy. The eggs inside were looming. A classmate said mischievously: "These eggs almost turn into salted eggs!" » Professor Zhou continued to stir in the water with wooden chopsticks. Then Master Zhou took out the eggs and put them back in the salt water. I was beating them hard and I was raw. I was afraid it would sink and never rise again. My classmates were also watching with wide eyes. "Ah! It worked", I couldn't help but scream. As soon as Master Zhou put it down, the egg. I had the impression that there was noace of gravity on the moon. The students were also surprised. It turned out that the density of salt water is greater than that of eggs, so science floats everywhere. , it's actually around us.
3. How to write a journal of elementary school students' salt water experimental activities.Today my mother and I did a little experiment together. The name of the experiment is “Eggs Floating in Salt Water.”
First we took out an iron cup, took a cup of warm water, and then put a raw egg in it. I discovered that the egg had sunk to the bottom of the water. I thought: how can I make the egg float? My mother saw the confusion on my face and said with a smile, "Put some salt in the water and the eggs will stand up." » So we started putting salt in the iron cup. One spoon, two spoons, three spoons, I put the salt and mixed it in the water with chopsticks. Luckily it was eaIf lukewarm, it would have melted very slowly. A lot of salt has been added, but the eggs don't react at all. Mom said, “No, you have to add salt.” » Then we continued adding salt to the water. Eventually, the egg finally floated.
I asked my mother: "Why can eggs float in smoky water?" » My mother replied, “Because the density of salt water is greater than the density of eggs, so eggs can float in salt water.
I was very happy, because this magical science experiment taught me another interesting scientific knowledge.
4. A short sample essay on a science experiment will sufficeWow! Wow······! "Huh? What is this sound? Where does this sound come from? It comes from classes 5 and 7 of Luohe Primary School, that is, our class. You may still wonder: " Why is it so lively? "Listen to me slowly. In the two composition lessons of thist afternoon, our Chinese teacher, Master Zhou, said he would take us to do experiments. Hearing this news, we were very happy. Some students even shouted: "Master!! Long live the teacher!" And me? I was even more excited. I couldn't wait to find out what the experience was like. I asked the teacher, but the teacher wouldn't reveal a word to us. Our curiosity grew even stronger. Look ! Let's go ! The teacher took out a packet of salt. A spoon, a raw egg and a transparent cup. Then the teacher said: "If you put the raw egg in a cup with water, add the appropriate salt, then stir vigorously. , when the salt dissolves, the egg floats. The water surface. "Really? I saw that we were eager to try. The teacher first used a transparent cup to collect the water, and filled it half with hot water and half with cold water, and then carefully add the eggsyears to avoid breaking them like bullets. Inject it into the bottom of the cup. Then use a spoon to scoop out a spoonful of salt and put it in. All our classmates opened their eyes. and tall without blinking, lest they miss something. Suddenly the salt scattered in all directions. The water became muddy as I thought of the goddess descending to earth. The professor put another spoonful of salt in it and stirred it, but. the egg still couldn't float. What should I do? It's time to add salt. Just in case, the professor put two spoons of salt and stirred. After a while, the eggs floated! It was the group experiment turn and we all came up with ideas. I took Wu Feihan's cup, rushed to the toilet, got cold water, then went to the tea stove room, got hot water and I came home. in class. The camarasThe class couldn't wait and went back to class. Ah! The egg floats! The professor said that when the density of water is greater than the density of eggs, the eggs float. What an interesting experience.
5. Real Experience in Salt Water and Eggs Science Experiment EssaySalt Water and Eggs Science Experiment Today, after finishing my homework, I don't had nothing to do, so I did an experiment with eggs floating in water. . First I prepared experimental materials: a transparent glass cup, a spoon, raw eggs and a large pot of salt. I put half a cup of water into the cup first, then put the eggs into the cup. I saw the eggs suddenly. They sank to the bottom of the cup. Then I put some salt in the cup and stirred it carefully to speed up the dissolution of the salt in the water. I stirred and stirred, and suddenly found that the egg was parti. The bottom of the cup, but after a while the egg sank again. At that time I put salt in the cup, when I was about to put it, my mother came back when she saw the scene spread over our. table, she immediately started nagging: "Look, you're making trouble again." I don't do serious things anymore. " "No, I'm doing an experiment on how to make eggs float. in water. » However, when my mother learned that this was the case, she quickly took a bag of fine salt and handed it out. I said, “Fine salt dissolves faster than coarse salt. » So I added a few spoons of fine salt. and I stirred it gently. The eggs really floated and even surfaced. I screamed with joy. I stood up: “The experiment was successful, the experiment was successful!” " When I was dancing for joy, my mother asked me seriously and earnestly: "Do it! “Do you know why eggs float?” My mother’s question made mehappy. More than half the time, I was truly speechless and couldn't understand any meaning. But my mother “forgave” me and gave me time to look up. information and find the answer for myself. Later I found the answer on the Internet: When the weight of an object is greater than the buoyancy of water, the object sinks when the weight of the object is less than the buoyancy of water. In water, the object floats. Water has a specific density. When we add salt to water, the density of water increases. When it reaches a certain value, the density of water is equal to the weight of water. the egg, and the egg will be suspended in the water; the density of the water is greater than the weight of the egg, and the egg will float on the surface. It turns out that my mother asked me to constantly add salt to the egg. the water. In order to increase the density of the water, the eggs floated out of the water. Using your hands, experimenting, using your brainwater and searching for information you can really learn skills and gain knowledge.
6. How to write an essay on a small experimentThis morning, I came to class early, took out my homework and started working on it seriously. Halfway through writing, I saw Professor Wang wearing big and. small bags. Something seemed to surprise us and I was full of questions.
Now it's classy. Professor Wang rolls the scroll as usual. After the call, the mysterious He raised an object and asked: "What is this?"
Everyone said in unison: "Yes, today 'Today we are going to do a little experiment. "When I heard that an experiment was going to be carried out, my whole body became excited and the doubts in my heart were "resolved". The teacher then said: “Whoever can crush this egg with one hand will win a prize. »
Everyone raised their handsn, almost all boys. Unexpectedly, the teacher first invited a “little girl” – Chen Si. Chen Si “wrapped” the eggs with his hands, and then licked them harshly. But looking at her, it seemed like she wasn't using any strength. The teacher was encouraging her, but she couldn't break it, and then the “big guy” of our class – Wang Zhihua, entered the stage. . I saw him holding the egg and sucking it hard. Look, his face turned red and his hands were “vibrating” like a “generator”. You could see that he had used all his strength to suck the milk and couldn't squeeze it out. Regardless of everything, Yang Zhenhui rushed to take the egg, positioned himself, and squeezed it tightly. The whole person looked like a bow!
All three people tried, but no one could break it. Professor Wang asked: "Why, even if three people pinched it, they couldn't break it?" raised his hand. He hassaid: "Because the egg is round, our force is evenly distributed in each corner of the shell, so no one can crush it. » Everyone said yes after hearing this. Professor Wang said: “Many scientists have also used this principle. For example, the shape of the Sydney Grand Theater is round, which is beautiful and solid.
In this way, a small pleasant experience was achieved. It seems life is so wonderful!
7. The course of the experiment: the story of eggs in salt waterToday I did a very interesting little science experiment at home, which made me understand any object in water will be subject to buoyancy, and the greater the density of the water, the greater the buoyancy it will receive.
Under the direction of my father, I prepared the materials for the experiment: a large glass. , salt, spoon, eggs. Step 1: I took the kettle, I vpoured half a cup of water into the glass, then I put the eggs in the water. The eggs sank slowly to the bottom of the cup without moving. p> < p> Step 2: I put 5 spoons of salt successively and the egg floated slightly to the top, I added 3 more spoons of salt successively. Look: the egg went from lying down to standing upright, touching the bottom of. The area has become smaller. Step 3: I took out the eggs and stirred the salt water with chopsticks. The salt at the bottom of the cup was almost melted. Then I put the eggs in. The eggs continued to float up and down. . After a while, they stay still. The middle of the water cup will stop moving.
Step 4: Add 3 tablespoons of salt and the egg will gradually rise to the surface of the water. The top of the egg will emerge from the water occasionally. Press the egg with your fingers, release your fingers and the egg will reappear. Why do eggs float? I askedI said to my father and after listening to his response. , I finally understood that it happened like this: When the eggs were first put into the water, because of the ratio of the eggs,It is heavier than the water, so the pushing force on the egg is less than its own weight, so it will sink to the bottom after adding salt, the water dissolves the salt and the density of the water increases. of salt water is equal to the density of the egg, the egg will float in the middle of the water; when the density of salt water is greater than the density of the egg, the egg will float. float on the surface of the salt water and the top of the egg will come out of the water.
Dad told me: Every object in water experiences a buoyant force. The magnitude of the pushing force is equal to the weight of the volume of water displaced by the object. This is the famous “Archimedes’ law”. ", also called the law of buoyancy. When I grew up and learned physics, I understood everything. I really hope to grow up quickly and acquire pmore scientific knowledge. When I grow up, I will definitely become a scientist and explore more scientific secrets in the magical world of science.