Grade 6 assignment 4 and grade 6 assignment

It is taught by people and taught by the Soviet Union.

An Interesting Experiment Once, I was eating an egg when I had an idea: Can I write on an egg? So I hurried to ask my father as if I had discovered a new world

Dad, can you write in the egg? "Absolutely! Dad said suspiciously.

Can you teach me how to write? I asked ...... urgently

I excitedly ran to the kitchen to ......

I took out an egg, washed it, and then carefully dried it; Then he took a brush dipped in sour vinegar and wrote the word "Song" on the eggshell, and then put the egg in the air for a while, because according to Dad, he had to wait until the vinegar evaporated. I saw that the time was almost up, and put the eggs in the pot - boiling. A minute passed, and I took out the egg, "Hey, why isn't it cooked yet!"

Time flies! I reluctantly put it back in the pot. Two minutes, three minutes passed, and I couldn't wait to take out the eggs, "Haha, cooked!"

I smug myself to myself. The egg was put into cold water by me, waiting to cool, and I stared intently at the egg, the fruit of my labor. Fifty seconds passed, and I excitedly peeled the egg and looked at the white and smooth body, "Oh my God!

The song I wrote on the eggshell was actually printed on the egg. I said in surprise. However, this experiment still puzzled me.

Holding this unusual egg, I rushed into the study with doubts, turned on the computer ......It turns out that after acetic acid dissolves the eggshell, it can also dissolve a small amount of protein, and the protein has an amino acid group, which will be hydrolyzed under acidic conditions, showing blue or purple. "I see! It really made my mouth start!

From this experiment, I understand that in fact, in daily life, as long as we observe carefully, we will find many interesting things, and if we can put them into action, we can also gain more knowledge, wouldn't it kill two birds with one stone!

Assignment 4: Remember an experiment.

Abroad, there is a magical sea, known as the Dead Sea. Even people who can't swim, in this sea, will not drown. Why?

According to scientists, the sea is rich in salt several times more than the salt in other seas, so that people can float. Is salt water really buoyant? Today, I did a little experiment with the buoyancy of salt water with questions.

I want to see if the Dead Sea is floated because of the lot of salt.

I already had the ingredients ready: raw eggs, tap water, a large cup, half a cup of salt. First of all, I put the tap water into a large cup, the tap water here represents the Dead Sea, and then gently put the egg into the fresh water cup, I held my breath and solemnized, only to see that the egg did not change, still sinking in the fresh water, back and forth several times, all the same result.

It's, I guess: why doesn't the egg float, is it heavy? I picked up the eggs and was worried, 50 grams at most.

After a while, I put a few spoonfuls of salt in fresh water, stirred it with chopsticks, and slowly put the egg into the cup, I watched intently as the egg slowly rose from the bottom of the cup and surfaced, and I was overjoyed. But I was curious: it was amazing that an egg could come out of the bottom of the cup and change so much from the same egg!

My curiosity grew, and I put a few spoonfuls of salt in a large cup and stirred it, and I found that the egg had surfaced in a larger area, almost jumping out of the cup. I was amazed that the eggs had lost weight and that the eggs reacted so much to the salt. I can't understand what I can't explain.

After checking the information, I suddenly realized that eggs have such a big reaction to salt because the density of salt water increases, the buoyancy increases, and the eggs naturally float.

I gained a lot of knowledge from this little experiment. Doing experiments is both interesting and knowledgeable. In the future, I must observe more ** and be a caring person in life!

If you look for it from elementary school, you will definitely be able to find it.

Our life is happy, peaceful, full of laughter, but there are also many hidden dangers and beautiful pitfalls. Therefore, we must be on guard at all times and have the ability to protect ourselves.

It is true that danger can be daunting, and if it is serious, it can ruin people, but as long as we master the correct methods of self-protection and self-rescue, we can successfully stay away from danger. Not long ago, I saw an example on the Internet, and I couldn't help but admire this girl very much. This example is about:

A sixth-grade girl had to clean her classroom at school, so she couldn't go home until late in the evening. After leaving the school gate to separate from her classmates, she stepped alone into the only dimly lit path leading to her home. Because it was already evening, and there was a lack of street lights on the path, it was very dim, and there was no sound in it.

Halfway through, she noticed footsteps behind her and quickened her pace. But the man followed him closely, and a thought suddenly popped into the girl's heart: he was a bad person!

So I kept trotting back. It was almost home, but the man kept speeding up and followed, and the girl became more and more nervous. Suddenly, a woman came in front of her, and she ran to the woman and said loudly

Aunt Zhang, do you remember me? It's the girl who came to your house last time to play! While she was talking, the girl stole a glance at the man, and found that he had already fled in disgrace.

This incident tells us that when ,,,we encounter danger, don't panic, calm down and take measures first, so that we can escape from danger.

The students had a heated discussion. Wu Yu said loudly: "Others are others, we are ourselves, and we can't do things that others can't do."

Littering a battery may make the crops not harvested, this small battery will cause so much harm, we should protect the environment, so that life is more beautiful, why not? ”

I don't think it's right to litter batteries, because the radiation from batteries can cause great harm to the human body," Zhang Yifeng said next. "Now the city is stepping up planting flowers and trees, in case the battery is thrown into the soil, it will harm the soil, and the survival rate of flowers and trees is not high! Li Yizhou said excitedly.

I don't think Wei Xueming is right, if each person throws a section, it will add up to a lot, and it will cause great harm. Jiang Ye is not to be outdone: "I think batteries can't be littered, because this inadvertent action of human beings will endanger nature and the survival of animals and plants."

When I got home, I asked my mom what she thought about it, and she said, "It's bad behavior to throw garbage around." In particular, littering batteries is very polluting to the environment.

Because batteries release harmful chemicals that endanger human health, humans are unknowingly harmed. Therefore, good living habits should be developed from an early age. ”

I also collected opinions on the Internet: there are scientists who experiment that if you throw a battery into the water, the small fish in the water will die; When buried in the ground, 60 square meters of land will be in ruins. NX Children's Learning Network - Children's Learning Resource Center.

After this discussion, I understood that waste batteries should be thrown into a special trash bin in the future, and should not be thrown away casually.

Copy it, there will be times when you regret it.

After reading the wonderful book "Robinson Crusoe", a tall image always appeared in front of my eyes, he was the brave explorer and navigator Robinson. With tenacious perseverance and the spirit of never giving up, he realized his dream of sailing.

It was as if I saw a man standing on the deck of a steamer: he had given up his rich and comfortable life, disgusted with the mediocrity, and had embarked on a great challenge of survival in a duel with death. All kinds of misfortunes and difficulties did not overwhelm Robinson, but made him stronger.

The difficulties that God gave Robinson were even more challenging for him!

The storm and tsunami, the whole ship except Robinson was spared, and the real survival challenge has just begun!

Stranded on an isolated island, he ran all day ashore in order to find a suitable place to live, and found a shelter under a mountain rock. Robinson pitched a tent at the foot of the hill, as large as possible, and put a few wooden stakes in it to hang the hammocks. The next day, he piled up all the chests, as well as the planks and the materials for making the rafts, into a makeshift fence for fortifications.

But only a dozen days later, a sudden collapse occurred. Robinson not only transported the fallen loose earth, but also installed a ceiling and supported it with pillars underneath to prevent another catastrophe from landslide. Never giving up, Robinson laid the foundation of life.

Once, the chaff that Robinson accidentally dropped in the corner of the wall actually grew green stems, and soon, dozens of ears grew, which was really a blessing from God. From then on, Robinson sowed half of the seeds to experiment with during the rainy season in order to get more food. In the worst experiment, the barley and ears of rice were harvested only half a bucket.

However, after this experiment, Robinson became a master of farming. Knowing when to plant, now he knows that he sows twice a year and reaps twice. Never giving up, Robinson had the rations of life.

Shipbuilding and returning to his hometown, Robinson spent several years and countless efforts. Just cutting down trees is months. But because he didn't think about it beforehand, the boat was too far from the sea, and he couldn't get the boat into the water.

Now, years of hard work have been spent, and all hope has been dashed. It wasn't until Friday that that hope was re-raised!

Robinson was a great man, a man of perseverance, who lived alone on this deserted island for 27 years. He dared to fight against the harsh environment, worked diligently, and managed the island in an orderly manner. He tempered himself in the face of adversity and achieved an extraordinary career.

This book teaches us that only perseverance can win, only hard work can get us out of trouble, and hard work is more important than faith......

My life will also set sail with this book, and in the voyage of life, move forward bravely and never give up!

Do the experiment first, and then write down the experimental process.

Sorry, we haven't written it yet!

In a small village in the middle of nowhere, there lived a group of poor villagers, and the Himalayan girl was one of them. The people in the village liked her very much, because she was a good girl with integrity, beauty, kindness, and high moral character.

In fact, this village was not poor before, but a rich and civilized place. However, in the middle of summer five years ago, it suddenly snowed so quickly that the entire village was wiped out in just five seconds. The next morning, the snow slowly melted, but the people were amazed to find that all the brick houses they had worked so hard to build had been turned into filthy and smelly thatched huts; They went to plant the land, and as soon as they sowed the seeds into the soil, the seeds rotted.

The Himalayan girl knew that all this was done by the snow ghosts.

So, after a lot of trouble, she finally found the snow ghost one day five years later and asked him to change the village back to its original state. Because the snow ghost is bent on taking the Himalayan girl for himself, so she said: "Of course, but I have a request, you must marry me."

If you get three bowls of divine water and turn the village back to its original state, but don't return to me within 50 minutes, then you will die in the same place and become a snowy mountain. Hahaha. The Himalayan girl glared fiercely at the smiling snow ghost, turned around and took the water away.

She ran to the highest hillside in the village, carefully sprinkled the divine water into every corner of the village, and in an instant, the village returned to its original appearance. The Himalayan girl was so excited that she stacked the three bowls together, put them on her hat, twisted her waist, and danced a cheerful "top bowl dance". Jumping, jumping, she forgot the time, fifty minutes were up, she fell to the ground like a flower withered, and slowly, she became a towering, towering snow-capped mountain.

She is the highest Himalayas in the world, because the Himalayan girl's noble character of self-sacrifice touched the gods of heaven and earth, and God gave her higher than the sky; The earth has given her more than the earth, so that no mountain has surpassed her sacred height!

Is it a human-taught version??? Proposal or comics???

Write a story with a piece of paper cutout.