Before class, the teacher assigned the task of collecting salt culture-related knowledge, and the students took active actions and were fully prepared. At the beginning of teaching, the substitute teacher used riddles to stimulate interest, which suddenly aroused students' curiosity and attention. The press conference began, and the students reported idioms, two-part allegorical sayings and stories related to salt ... The students' reports were lively and interesting, and everyone listened carefully. Then, the teacher led the students to do an experiment on how to distinguish salt: the process of distinguishing salt from six similar substances by exclusion, smell and taste. The teacher also guides students to discuss and summarize how to choose salt and its function in real life. Finally, the students said that the understanding of salt in this class was rich, vivid and interesting, and they volunteered to present it in the form of small exercises.
In this lesson, students have experienced the fun of participating in learning, the significance of sharing knowledge and the learning spirit of daring to question and explore in the process of understanding salt.
About the Composition of Salt 2 Salt is one of the indispensable condiments in our life. Students, do you know? If we eat a high-salt diet, salt will become an invisible killer.
Harm of high-salt diet: Many scientific studies have proved that excessive salt intake can lead to many diseases, such as coronary heart disease, nephropathy, cerebrovascular disease, overweight, obesity, gastric cancer, osteoporosis, asthma and so on.
At the beginning of our family, my mother used a lot of salt to add flavor to the dishes. Later, I told my mother about the dangers of a high-salt diet. Later, my mother used a lot less salt. At first, my father was not used to it, and my mother gradually reduced the salt. Later, everyone got used to it, so they didn't think the food was weak.
For our health, we should insist on eating less salt!
At noon this summer, my mother gave me 1. Let me buy salt for 5 yuan. I took the money and ran to the supermarket. I stumbled across a remote-controlled plane with a cool appearance. As long as 300 yuan, I ran home and put my 298. I brought it here for 5 yuan. I want to put that cool-looking remote-controlled plane. However, 1 is missing. 5 yuan, I gave it to my mother 1. Five yuan and my pocket money added up to buy a remote-controlled plane. I ran home as fast as an arrow.
I go home to play remote control plane. My mother asked me where the salt you bought was. I forgot to buy salt for my mother. When my mother was treating patients, I found an empty salt bag, which contained no salt and sugar. Then I put the mouth of the salt bag on and went to play with my remote control plane.
Mom grabbed a handful of "salt" and put it in the pot while frying fried noodles. Have a taste; Yi Xiang grabbed a handful of "salt" and put it in the pot. I took another sip. It's getting sweeter. My mother called me into the kitchen and asked me what happened, so I had to tell my mother what happened. After listening to my mother's words, my mother and I both burst out laughing.
Whenever I think about it, I will secretly laugh from my heart.
On Sunday, my parents and I went to Yancheng to find autumn.
When we came to the field, we saw golden rice. A gust of wind blew and shook the rice like a golden ocean. And the fiery red sorghum, at first glance, rows of sorghum are like burning flames. Cotton candy is as white as many cotton candy, which makes people drool.
We also came to the park, and the leaves on the trees turned yellow. The wind blows the leaves to the ground, like spreading brown autumn clothes on the ground. Only pine trees and green leaves. There are rows of red flowers everywhere in the park, and the red one is brighter than the cockscomb. Osmanthus fragrans is also in bloom, and the faint fragrance is really charming.
We came to the orchard again and saw many fruits, including apples, oranges and pears ... indeed countless. Big, red apples are like bright rubies. That yellow orange is like golden gold.
Finally, we came to the river and saw a group of fish playing in the crystal clear river, swimming east and west for a while. They had a good time!
Ah! Autumn in Yancheng is really beautiful!
There are many beautiful scenic spots in Yancheng. Today, I will introduce Du Yan Park in Yancheng!
Hello, I'm Xiao Wang, the tour guide. Now let's move on. When you enter the door, you can see that many large bowls are running water, and the water flowing out is very clean. If we go forward, we can see an artificial lake with some musical fountains. Then turn right and you will arrive at the Music Square. Now, you can sit in the chair next to the square and have a rest 10 minutes, and then set off.
It is time. Let's leave now. Please follow me. Children, please watch carefully. Go left, and you'll get to the "Stone Gate on the Waves". Children, please watch carefully. "Crossing the waves at Shimen" is a small gravel road made up of many stones. The water here is very clean and drinkable. The water here is very fast, because there are many waterfalls criss-crossing, and sometimes you can see small fish swimming.
Further on, we can hear a lot of noise, which is actually the sound made by the waterfall. When we climbed upstairs, we could feel the chill.
Let's call it a day trip. I hope I can be your tour guide again if I have the chance next time.
Composition 6 about salt is on holiday. Today, my mother and I did an experiment of "eggs floating in salt water".
First, I took a glass of water, salt and eggs. I'll add some salt to the water first, and then put the eggs in it. I looked at it for a while and found that the egg didn't float. I was in a hurry and ran to ask my mother. My mother said let me try again. Then, I added a little salt to see if the eggs floated up again.
After a while, the egg doll still sank in the cup, as if to show me its diving skills!
Finally, I kept adding and adding ... until the eggs floated, I stopped adding salt. Watching the eggs float up, my heart is full of joy, but why does salt water float the eggs up?
It turns out that the density of water and salt is getting bigger and bigger, which exceeds the weight of eggs and the eggs will float.
Through this experiment, I understand why salt water can make eggs float.
Composition about Salt 7 Salt makes us enjoy delicious food. Sodium in salt is an indispensable mineral in human body, which exists in various tissues and organs of our body and has very important functions. But eating too much can lead to many diseases, such as coronary heart disease, kidney disease, overweight, stomach cancer, asthma and other health problems. Eating too salty directly affects children's absorption of zinc, leading to zinc deficiency in children, which will reduce immunity. It also affects the absorption of calcium. Seeing this, we clearly know why we need a low-salt diet.
There is not a saying that salt is like arsenic at night, and the amount of salt used for dinner should be reduced. Usually, you can eat more foods rich in potassium, such as kelp, seaweed, fungus, yam, potatoes, etc., to offset the harm of excessive sodium. Minimize foods with high salt content such as pickles, pickled foods and ham. In order to be healthy, we should eat a low-salt diet immediately, and the whole family should not exceed 6g of salt every day and persevere.
Composition 8 On Salt I read an article in the composition book that eggs can float with salt water. I don't believe it, just do a little experiment.
I put the round eggs in the cup first. Fill the cup with water, then add some salt, and then stir it with chopsticks, but I haven't surfaced yet!
I took my composition book and read it carefully. What I said in the book is the same as what I did! I think maybe there is too little salt!
So, I stirred while adding salt, and the salt was almost used up and the egg was half exposed. I am very disappointed. Suddenly, my mother said to me, "You should stir so much salt slowly." I listened to my mother and stirred slowly. After a while, the eggs floated and I jumped up happily.
This experiment really ended in failure!
Composition on Salt 9 This morning, I saw a scholar doing an experiment on floating eggs in salt water on the program "One of My Extra-curricular Books", so I wanted to try it myself, and my mother supported it.
I found a transparent water bottle, an egg, a big spoon and a chopstick. My experiment is ready. Then I put the eggs in a water bottle and filled it with water. The experiment began.
At first, the egg sank to the bottom of the bottle, and I learned to add salt to the water like on TV, and then stir it with chopsticks. After stirring for a while, the egg still sank to the bottom. I'm a little anxious. My mother said that the salt water concentration was not enough, so let me take my time.
I added some more salt and stirred it again, adding it three times in a row. Finally, the eggs began to float slowly, so happy! If you press it with your hand, it will float again.
After the experiment, my mother told me that this is a physical phenomenon: because of the high concentration of salt water, the buoyancy of water on eggs increases, and when the buoyancy is large enough, the eggs float. This is really an interesting experiment! Science is really interesting and profound!
Composition on Salt 10 In our daily life, we can't live without salt, which can make our meals more delicious. It also has many medical functions, such as drinking a cup of light salt in the morning, which can clear stomach fire and eliminate bad breath, but it is necessary to control salt and limit the amount of salt.
Excessive salt intake can lead to diseases such as hypertension and respiratory diseases. Excessive salt will increase the burden of renal excretion and do great harm to our health.
The World Health Organization recommends that the daily salt intake of each person should not exceed 5 grams, and nutritionists in China suggest that it should not exceed 6 grams.
For our health, we should use salt scientifically, form good eating habits, eat more light food, eat more fruit, eat less or not eat pickled food, and persist for a long time, which is beneficial to health.