My discovery

I found that 300 words 1 ant is a small insect. It has six legs, climbs fast and has a pair of tentacles on its head.

Ants have a strong sense of collectivity. Once, I boldly caught a bug and put it next to the ant hole. An ant found the bug and climbed over it as quickly as possible. It bites the worm's tail first. Because this little bug is several times bigger than the ant, the bug threw the ant aside with a wave of his hand. The ants were so anxious that they couldn't do it several times. It crawled home in a hurry.

After a while, the ants climbed out of the house, with a large group of ants behind them. I think this should be the "helper" invited by ants! Ants with a large group of ants launched a fierce attack on insects. The first batch, the second batch and the third batch ... The ants attack continuously, and the bugs are not to be outdone, and they fight back again and again. This bug killed some ants smaller than itself with its powerful pliers. After a battle, the bug was so tired and panting that it was finally killed by an ant.

From this incident, I found the truth that many hands make light work.

On Sunday morning, I didn't have breakfast, so I asked my mother for two yuan to buy breakfast. I was walking in the street and saw someone selling jiaozi, so I was going to buy jiaozi to eat.

The aunt who sells jiaozi cooks while cooking, so that jiaozi will be fresher. She prepared the stuffing and then the dough. Put on makeup and prepare to wrap jiaozi. After jiaozi wrapped it, it didn't seem to be enough to plug his teeth. But after cooking, it is much bigger than the original jiaozi, and it also floats.

Bought breakfast, with questions, hurried to "100,000 Why" and finally found the answer.

It turns out that hot objects will expand, and jiaozi and water are no exception. Dumpling stuffing and dumpling skin expand faster than water, and their volume is easy to increase. However, jiaozi's weight has not increased, its volume has increased, and its weight per unit volume has decreased. According to Archimedes principle, jiaozi will lose the weight of the same volume of water when immersed in water, and this lost weight is the buoyancy of water to jiaozi. Because jiaozi is very big, it lost a lot of weight in the water. It is certainly not a problem to float a jiaozi with a smaller weight per unit volume with greater buoyancy than before.

I finally know the secret of why jiaozi swelled and why it floated! Observe and think everywhere, and you will have more knowledge!

My discovery 300 words 3 Spring has come and everything has revived. I saw groups of tadpoles chasing and playing in the water in the pond of the community. Just as I was deep in thought, suddenly a frog jumped into the water and croaked.

I heard that tadpoles are frogs' babies, but I think they look so different. Because tadpoles are all black, and they have tails and no limbs. This frog has a white belly, a green back, several dark stripes and limbs. Why do frogs and tadpoles look different?

I quickly ran home and took out "100,000 whys" to find the reason. Tadpoles just hatched from eggs are black and round, with a tail and no limbs. They like to attach themselves to aquatic plants, and their mouths will grow in a few days. After about forty days, tadpoles will gradually become young frogs. After reading it, I suddenly realized that this nature is so wonderful!

So, I waited patiently day by day and went to see the pond every day after school. Finally, I found that the tadpole's body changes quietly every day, just like the book said. I'm glad to have solved this mystery!

I found 300 words for 4 seconds. Time flies, and the week is coming to an end. I'm so bored at home, I want to stroll at home. Yellow cauliflower is like a yellow sea and blue willow, just like a beautiful fairy floating gently in the breeze, only seeing a plastic film covering the soil.

I walked to the land in doubt, gently lifted the plastic film and looked at the seeds planted in the land. I put down the plastic film in my hand, scratched my head and looked at the cauliflower around me, wondering what was going on.

In this way, I ran to ask my grandmother, why do you have to cover it with plastic film after planting vegetables? "This you don't understand! If you cover it, it will desperately look for it, and in this search, it will grow! When it arrives, take off the plastic film and bask in the sun, and it will grow fast and big. " Grandma said vividly. Oh, I nodded again and again, and suddenly I felt deeply.

This skill is just like our study, so we should study hard. As the ancients said, there is a road to diligence in Shushan, and there is no limit to learning from the sea. Only in this way can it grow and play fast, and our knowledge is bigger, wider and richer.

I also found that if you want to understand its mystery, you must study hard and ask questions, so that you can know a lot of knowledge and observe the truth of life more.

One sunny day, I was taking a leisurely walk on the path, and a long string of ants caught my attention: some were big, some were small, some were dragging a white package under their stomachs, and some were still holding something in their mouths. Every ant looks flustered and goes all out. It turns out that they are moving.

Seeing this, I suddenly thought of a proverb: it will rain when ants move, and it will rain when spiders weave webs. After a while, the sky was overcast, thunder and lightning, and it rained cats and dogs. I am puzzled: how do ants know it will rain? I went to ask my father, who said, "Don't always rely on others, you can find the answer from books." After listening to my father's words, I picked up a copy of "100,000 Why". The book says, "Ants are small weathermen. Before it rains, the nest is particularly stuffy, and ants are very sensitive to temperature. Once the nest is particularly boring, the ants are ready to move. " They move to high places. Only by moving to high places can their homes not be flooded.

Although ants are small, they have given us a great education: there is knowledge everywhere in life. As long as you pay attention to observation, think seriously and be a caring person in life, you will find more mysteries.

My discovery is 300 words. My mind is always full of strange ideas, but I will also find something.

I am always fascinated when I see hens laying eggs. Looking at the eggs on the table while eating, I always wonder why the eggs are sharp. Lying in bed, walking on the road, always thinking: sharp? Why is it sharp? Why don't hens break eggs? Then, after reading the meaning of "cooling" in the book, the question has come to the bottom: is the egg soft before laying, cooled by air when laying, and finally squeezed into a sharp point?

Because I found this conclusion, I was very excited and thought I was the first person to find it. I even named this conclusion-"Chicken lays eggs, egg lays chicken conclusion".

Until one day, I saw this truth in a book and my heart was cold. Alas, I am not the first person to find this conclusion! When I got home, I said to my mother, "It's all your fault. You didn't give me a conclusion, others beat me to it. " My mother laughed as soon as she heard it. She laughed enough and said to me, "People have come to the conclusion that you haven't been born yet!" "ah! ? No! " ……

Although it is late, I came up with this conclusion myself. Who told my mother not to give birth to me early?

My discovery is always late. Looks like I'm going to talk about her.

I found an earthworm in front of my grandmother's house. I looked for its respiratory organs carefully, but I couldn't find them anywhere. Because both ends are round.

It was very hot at that time, and the earthworm crawled there. I found a sorbet stick nearby, dug a small hole around it and put the earthworm in it. After a while, it appeared, motionless. I think it may be that the soil is too hard, and it is more likely that I don't like sunshine very much. I covered it with a leaf and went home.

The next day, I went there to play again and found that the leaf was still there. When I took it down, the earthworm was still there. Is it dead? I thought to myself. I touched it with the stick again and it moved slightly. I'm glad it's not dead. Continue to shield it from the sun with leaves.

Three days later, it really died, and I never understood it. Maybe it is inseparable from the soil, maybe the temperature is too high.

When I got home, I found a hundred thousand whys. It turned out that it was really because of the hot weather and lack of water that he died.

I found that after playing table tennis at the weekend, I waited for my mother to pick me up under a big, thick tree.

For a long time, my mother didn't come, and I felt so bored ... The bark on the trunk was pitted, just like wrinkles on the face of an old man ... Hey, why is there an ant on this tree? I followed the direction of the ants and saw the tree-a large group of ants wanted to climb the tree.

However, a yellow tape with rubber facing up blocked their way up. Humans are really smart and can stop ants from climbing trees.

When I came to my senses and remembered why my mother didn't come to pick me up, I saw that ants had changed the way they climbed trees.

An ant climbed up first and was stuck on the tape. The second ant stepped on his companion and got stuck again. The third ant took a few more steps along the route of the first two ants ... Finally, dozens of ants paved a road on the yellow tape, and more and more ants climbed the tree through this road.

The collective strength is infinite, and it takes the efforts of each individual to get the fruits of success. After picking me up, my mother told me what I found.

One night in autumn, I found 300 words, and my home suddenly lost power. By the light of the mobile phone, my father found half a candle, lit it and put it on the table. After a while, the power was turned on. I tried to blow out the candle with my mouth. I tried several times in a row, and the naughty candle torch seemed to be angry with me on purpose, but it didn't go out. What shall we do? At this moment, I saw the paper cup on the table, so I picked it up and covered it. In an instant, the bottom of the paper cup was black. I panicked and thought, this is in trouble. To my surprise, the candle went out soon. "Why is this?" I'm confused. I have no choice but to ask my father for advice. While touching my head, my father explained seriously: "Combustion needs oxygen." After the paper cup is covered, the oxygen in the paper cup will be used up in a short time, and the candle will be extinguished. "I nodded and smiled happily. It seems that as long as you are a conscientious person in life, you will learn a lot of knowledge that is not available in textbooks. There is no end to learning!

What did I find? 300 words 10 summer night, the heat wave hit people, making people uncomfortable, and our family sat at the door to enjoy the cool. There are so many mosquitoes in summer that they always bite my face and swell out big cells, which makes me itchy and uncomfortable. Suddenly I saw the gecko on the wall eating mosquitoes. Geckos are like my little saviors, but they are natural enemies of mosquitoes. They crawl on walls, windows and ceilings to eat mosquitoes. How handsome they are!

Why can gecko walk freely on the wall? I'm a little confused.

In order to solve this problem, I pay more attention to gecko. Sometimes I stick it on the wall like a gecko, but I can't climb it anyway.

I racked my brains and finally got an idea. This is my imagination, not necessarily true. I think: Gecko is too small, and its feet are coated with 502 super glue, so it can move freely effectively.

But I'm still not sure whether it's true or not, so I looked up the information on the Internet and looked at it. It's the original situation: it's because the gecko has a sucker on its foot and a small hook on it. They hung the hook on the wall so that it wouldn't fall off. Ah, so that's it! I suddenly realized.

"If we can get inspiration from the gecko, it would be great to invent a kind of sucker shoes. In this way, when there is a fire, we can climb down from the tall building and stick it on the wall safely! "

What I found was 300 words, 1 1. On Saturday, my father took me to the side net tadpoles in Longhu. After I came back, I put the tadpoles in a big fish tank and observed them carefully.

These little guys are so cute The whole body is dark gray, and the head is raised like a big comma. The tail is slender and flexible, which makes it swim faster. Eyes on both sides of the head, constantly rotating, observing the surrounding movement. When swimming, I always swing from side to side, just like dancing tadpole.

As time goes on, tadpoles have changed. Two thin legs grow back behind its tail, one pedaling and the other pedaling to help it swim faster. Soon, the front legs grew out, and they cooperated with each other and swam faster. Gradually, the tail disappeared without a trace, the body turned green, and some small peas grew on it, like acne. The head is no longer round, but triangular, with big eyes, wide mouth, long tongue and white belly, like a ball. It turns out that eating means opening your mouth and inhaling deeply. Now, it is squatting and staring at the front. Once it sees a bug, it will quickly stick out its tongue, roll it up and put it in its mouth to taste delicious food. It can eat pests and protect fields. People call it "an expert at catching insects". People should protect it.

How nice it is that the tadpole has turned into a big frog!

I found 300 words 12. Recently, I found that my deskmate Tao Zi has changed, and now I have made great progress. Next, I will tell his story.

Tao Zi, my deskmate, used to have a little habit of chanting thoughts in class, which affected my concentration in class like a young monk chanting scriptures. But in math class, when the teacher asked us to discuss the topic, he was silent, so let me say it alone, just like singing a monologue, it was really boring; When class was over, he didn't know where he learned to curse me, so I protested to the teacher and didn't want to sit at the same table with him.

Recently, through hard work, he has made great progress and changes. In class, I can concentrate on listening to the teacher carefully. He often raises his hand to speak in Chinese class and is praised by teacher Zhang. After class, he will also play games and chat with us and become lively. Once, when I was doing a number supplement, he also helped me check out a wrong question. Through his reminder, my homework also got a plus star. I am very grateful to him in my heart.

Now Tao is lively and cheerful, and he studies hard. I am especially willing to sit at the same table with him. I hope he will continue to work hard and climb a flight of stairs.

I found 300 words 13 on Saturday, my mother and I went to the park to play. I found a grasshopper on the green grass. I jumped at it, thinking that it must have escaped from my palm, but when I opened it, it was not in it. When I turn around, it has jumped far. I jumped again, and it escaped again, but it failed several times. I learned my lesson and caught it again. First, I turned my hand into the shape of a lid, crept close to it, and finally jumped up and grabbed it. Grasshopper, how can you have such a great escape ability? Mom praised it as the champion of long jump! It's amazing. I decided to take him home and study it.

I put it on the table and looked at its legs carefully. Its legs have three sections. The first section is strong, the second section is thin, and the third section is short and thin with huge teeth. It suddenly occurred to me that I read in "100,000 Why" that the grasshopper jumped so far because "big teeth enhance friction and stabilize itself" and "three legs and high jumping ability"! Oh, this is the secret! Grasshoppers have a green body. When I picked up the grasshopper and looked at it, its tentacles were moving, as if telling me to put it down. I waved the pen in front of it, and its tentacles followed. I put the pencil case in front of it, and it slowly put its tentacles on the pencil case and then bypassed it. Now I have a new discovery: the antenna is a small radar to detect obstacles!

Students, how interesting grasshoppers are! After listening to my introduction, do you also want to observe it? Then act quickly!

My discovery is 300 words 14. This morning, my mother made me breakfast and then went to work.

When I got up, I saw a bowl of porridge and two eggs on the table. After eating porridge, I began to play with those two eggs, and then turned around. It is interesting to find that one egg rotates fast and the other egg rotates slowly. But when I was not careful, an egg fell to the ground. I found it spinning very fast. It wasn't broken, but it was cooked. When I cleared the table, the slowly turning eggs fell. It's raw. What happened to my mother? I called my mother and she said she didn't know either. There is no way but to check online. It is said on the Internet that the shell, egg white and yolk of a raw egg are not integrated, so it turns slowly, while the shell, egg white and yolk of a cooked egg are integrated, so it turns fast.

I suddenly feel great, because this is a problem I found myself, so I have a great sense of accomplishment, and I know that there are many interesting things in the world, depending on whether you can find them!

I found 300 words 15 In recent weeks, the sky has been gray, and the rolling dark clouds are like rolling waves. Sometimes it rains heavily; Sometimes it ticks, jingles and rustles in the sky; Sometimes there is silent and thin Mao Mao rain in the sky. I carefully observed this natural phenomenon and found one of the mysteries: when it rains heavily, people's clothes will not get wet, and when it rains lightly, people's clothes will get wet. Why?

I asked my grandfather a question. Grandpa told me, "Because of the heavy rain in the sky, people will always be alert, hold an umbrella or run under the eaves to avoid the rain." When it rains in Mao Mao, people will never guard against it or let their guard down. Unconsciously, drizzle makes a mickle on clothes, and finally people's clothes will be wet by rain. It's like a reservoir. If it leaks a small hole, people won't repair it. After a long time, the gap will get bigger and bigger, which will eventually lead to floods. "Through this natural phenomenon, I understand that no matter how small things, shortcomings and problems are, they will always be worn away and become major events, major shortcomings and major problems.

Therefore, we should plan ahead and stop bad things when they first appear to prevent them from causing harm. If something bad happens, it's not too late to mend it.