A few days later, my mother found a teacup by the flower bed and said to me loudly, "Why did you pour black ink into the cup?" "I didn't?" I'm confused, too I took the cup in my mother's hand and saw that it was half a cup of black ink. Hey, who did this? There are only two children at home, my brother and I. Besides, there is only blue and black ink at home, but there is no black ink. I emptied the glass, leaving only a few rusty nails, huh? Could it be a "trick" made by rusty nails?
I was curious and decided to do the experiment myself. I found a rusty nail and a rusty nail, put them in two cups of tea respectively, and carefully observed the movement in the cups. Occasionally, there are some small bubbles on the rusty nails, but there is no movement on the rusty nails. Before going to bed at night, I observed it again and found that the water in the cup with rusty nails changed from yellow to brown, while the water in the cup with rusty nails did not change. A few days later, I found that the glass of water with rusty nails changed from brown to black, but the glass of water with rusty nails did not change. With this question, I went to my mother's room. My mother said, "Tea contains a substance called tannic acid, which is one of the materials for making ink."
There are so many secrets in life!
Spring is the best of the four seasons. During the Spring Festival, my mother and sister went back to Harbin.
Although it is the Spring Festival, the famous ice city Harbin will not show any signs of spring in February. There are only a few pine trees beside the road, and the rest is only snow. We also went to eat spring cakes. At first, I ate a dough with nothing. Mother said, "How can you eat like this? You should wrap it in shredded potatoes or something, otherwise it won't taste good. " I have to give the money to my mother.
After a while, we returned to Shenzhen. The scenery in Shenzhen is very different from that in Harbin. Flowers and grass are everywhere. Birds are singing and flowers are fragrant. Very beautiful. There are also some bees and butterflies collecting honey. Let's go to the small park to play. I saw many trees and tadpoles in the river. He is like a little black dot with a tail, swimming flexibly in the water. I asked my mother, "Mom, why is it spring here in Shenzhen and Harbin doesn't look like spring at all?" "Because the latitude of the earth is different. The closer to the equator, the earlier spring comes. Shenzhen is close to the equator, but Harbin is far away. So in March and April, it really came to spring in Harbin.
Nature is magical. Meanwhile, different places will have different seasons. I like nature and I like spring.
Climb the mountain in the Spring Festival this year and go to my aunt's house to play. After lunch, we all went climbing.
My brother and sister and I were jumping, running and talking and laughing in front of the adults. You chase me, I chase you. Soon, we left the adults far behind One by one, like mountaineers, we walked neatly through the mountains. I don't know how many winding mountain roads I walked, but I finally came to the middle of the mountain. At this time, a big stone blocked our way, but we didn't flinch, but moved on. I saw us crawling on the ground one by one, carefully climbing under the big stones, for fear of falling into the ditch next to us. We overcame the first obstacle with difficulty, and new problems appeared again. The road ahead is getting narrower and steeper, and some natural gas pipelines are piled up along the way. Now we are stumped. Is it forward? Or back off? At first, we hesitated, and finally we decided to move on and head for the top of the mountain. God has eyes. A sandbag road appeared in front of us and led us to the opposite side of the mountain. The road here is much easier. We ran to the top of the mountain with indomitable spirit.
Yeah! We finally climbed to the top of the mountain. The scenery on the top of the mountain is really beautiful! No wonder people often say that "infinite scenery is on a dangerous peak". After enjoying the beautiful scenery at the top of the mountain, we went home happily.
I went to the big lawn this evening. When the sun sets, look up at the beautiful scenery.
At that time, the sun seemed to shoot a sword in all directions and shot into my eyes, and my tears were about to flow out.
The clouds beside the sunset are changeable. Lily color, golden yellow, half red and half black in the blink of an eye, half purple and half yellow, half gray and half red. He's rosewood again. It's really colorful and changeable.
The shape of clouds was the same for a while. The shape of clouds is the same from time to time, sometimes like cotton clouds, and sometimes you are like waves on the Yangtze River. They change again and again so naturally and so quickly.
So fast, so amazing.
After a while, the sunset lost its dazzling light. Red, burning red gradually, blue sky. It dyed the earth red and reflected fields and villages.
It seems that a very heavy steel plate is pressed on the sunset and gradually falls.
Suddenly, the lower part of the sun fell into the dark clouds on the horizon, and the dark clouds were dyed red sandalwood. I knew the sun was going down, so I stared at it. In the blink of an eye, the sun left the last half of its face. At that time, the sky was red, as if there were fires. At this time, not only is the sky red, but I myself have become red.
Do you know why I like math? Because mathematics is attractive, I am deeply attracted by it.
Today, I learned a new knowledge, that is-Jia. Simple operation of subtraction. I learned to add. Simple subtraction method, my operation speed is much faster. Give an example! For example: 458+347+253=? A week ago, the method was to calculate from left to right. Now, I can use the law of addition and combination to calculate quickly: first add the last two numbers 347 and 253 to make 600, and then add it to the first addend. Add 367+498, I rewrite it to 367+500, add 2, so 867 MINUS 2 gets 865. Look, how convenient it is!
After learning the simple arithmetic of addition, it will be much easier to learn the simple arithmetic of subtraction For example: 483-299, hey, hey, I have a slight brainwave. I'll take 299 and subtract it from 300, because it's 1, so just add 1 to the result, and it's 483-300+ 1= 184, which is much easier. But I can remind you: it's best not to think about the minuend when you do subtraction, or you'll be in trouble!
Now, I like math more and more, and math really makes me remember deeply!
On Thursday, June, when we were doing our math homework during recess, Teacher Mao suddenly took a watch and asked us to go outside to do some preparatory activities. Today is five laps, which requires endurance and speed. After five laps, I'll look at the time here. I then asked, "Isn't that a ranking?" Teacher Mao replied: "Time is ranking!" We jogged to the playground, and Teacher Mao gave us three minutes to do some preparatory activities: one was wrist and ankle, and the other was sprinting to leg press. ...
Master Mao raised his hand and motioned for us to start rushing! Five laps! The lap runner of Class 4 (6) is proud! No matter how many obstacles there are in front of us, we must go forward bravely and not be afraid of any enemy!
The first lap began to explode and the whole body rushed to the second lap. Immediately after me, I turned my head and asked, "Is Chen still strong?" ? I'm dying! "He immediately caught up with me, and I caught up with him again. When I finished almost two laps, I really had no strength. As soon as I left, several people behind me overtook me. Now that I'm in my teens, I have no choice but to jog. On the last lap, I started to go crazy and overtook many people. The last time was 6 minutes 18 seconds.
I hate this running. Run five laps! I can hardly breathe after running well.
On a vast and beautiful grassland in Africa, a docile mother antelope took a leisurely walk with her lovely baby antelope. The gazelle runs freely for a while, and coquetry beside her mother for a while. It is really cute.
Suddenly, in the distance, a hunter secretly aimed at the gazelle. At this time, the antelope found and quickly stopped the young antelope. "bang!" With a gunshot, the female antelope fell in a pool of blood, and the young antelope cried in despair: "Mom! Mom! " Mother antelope said before she died, "child!" " Run, Hunter! Mom can't take care of you, so you should be more careful in the future! "The gazelle still refused to go and stayed with her mother.
The hunter came over and slowly picked up his gun, ready to shoot at the gazelle. At this moment, a lion rushed from the side and roared. The hunter was so frightened that he dropped his gun and fled.
Mother antelope said weakly to the lion, "Please don't hurt my child." The lion looked at the mother antelope and said, "Don't worry, I am also a mother. I can understand how you feel now. I will care about it like my own flesh and blood in the future. " Mother antelope listened to the lion and slowly closed her eyes.
Since then, in this vast and beautiful grassland of Africa, a beautiful and warm picture of a lioness accompanying a gazelle has been added.