What happened to the apple? Write a composition.

1. The apple tree is a kind of fruit tree. The roots of the apple trees planted in my yard are deeply rooted in the soil, so that the apple trees can absorb nutrients. The stems of apple trees are brown and as thick as bowls. Its branches are next to each other, as if a group of good friends were whispering. There are two rows of sawtooth on the lush leaves, and there are more than a dozen small stems on the leaves. It's really thick and thin.

In spring, the new green has just appeared in the yard, and the apple blossoms in the yard are competing to open. The huge canopy turned into a huge garden. From a distance, clusters, clusters, the yard seems to be piled with huge snowdrifts. A gust of wind blows, and the fragrant flowers penetrate the heart and spleen, making people feel so being relaxed and free, which is really refreshing.

Summer is a time when apple trees flourish. Each branch has peach-shaped leaves, which are green. You squeeze me, I squeeze you. Small apples have grown under the green leaves, only as big as apricots, and they are also green, like crystal emeralds. Pick one, take a bite, the skin is thick, the juice is not much, and the flesh is sour. These green leaves and fresh fruits sparkle in the sun. At this time, the yard became a vibrant green ocean.

In autumn, the leaves of apple trees are thin and turn red after being beaten by autumn frost. Autumn wind blows, leaves fly and fall to the ground one after another, stepping on it like a red blanket.

Students, do you like apple trees?

2. the change of apple composition 100 words May is my holiday is ing. I'm really excited. I like holidays. I think I will have a good holiday. I can't wait!

I decided to finish my homework first. I think there is too much homework. I hate homework, but after I finish it. I decided to climb the mountain with my parents. Because it can exercise and spend time with parents.

Next, I want to organize students to clean the park, which can also mobilize everyone to go together. I hope our earth is clean.

I spent my holiday like this, and you? How did you spend your holidays?

Maybe my holiday is coming. I'm really excited. My favorite festival. I think I will have a happy holiday. I can't wait!

I decided to finish my homework first. I think there is too much homework. I hate homework, but when I finish it. I decided to climb the mountain with my parents. Because climbing mountains can not only exercise, but also get along with parents at the same time.

In the next time, I want to organize my classmates to clean the park, so that we can mobilize everyone to participate. I hope our earth is clean.

This is how I spent my holiday. What about you? How to go on holiday?

3. The composition describes the color change of apple fruit when it is ripe. There is an apple tree, standing straight on the lawn like a sentry.

In spring, listening to the sound of river water, apple trees germinate. Little Bud shook her body from side to side and looked at the world. They greeted Sister Xiaohua and the swallows flying back from the south ... With these buds, the apple tree is no longer lonely. He is so happy!

In summer, the buds turn into dense leaves, and the apple trees are covered with a green dress, which looks more energetic. And his parasol became a parasol, providing a good place for people to rest. However, apple trees hate summer, because it always thunders and rains in summer, and many young leaves fall off.

In autumn, green leaves turn yellow. A cool breeze blew and the young leaves flew to the ground one by one. At this time, the apple tree produced a big red apple, and passers-by couldn't help picking one and putting it in their mouth. They all said it was sweet and he was happy.

In winter, it snows heavily. White snow fell on the apple tree and piled up layer by layer, turning it into a white dress. The apple tree knew that he was going to sleep. So he closed his eyes and fell asleep.

4. Why do apples rust? It's really boring to be alone at home. I picked up a book at random, and a short story in it attracted me.

This little story is about a father who is a detective. He told his son to take a nap, but he didn't listen and hid in the room to eat apples. When the father walked into his son's room, his son hurried to bed and pretended to sleep.

The father looked at his son's leftover apples and saw through them at a glance. He said, "Get up, I know you are pretending to sleep." The son stood up obediently when he saw that his father had found out.

I am very confused in my heart. How did the detective find his son pretending to sleep? I took another big apple to eat myself, but I was in a hurry to watch TV, so I took a few bites and put it on the table. I want to eat later. When there is an advertisement on TV, I want to finish the apple I just ate.

Huh? The apple I just ate suddenly turned black. Like to rust, why? No, I have to make a thorough investigation.

It turns out that when apples are peeled, phenols in plant cells will combine with oxidation in the air under the action of phenolase to produce a large number of quinones. Neoquinones can make plant cells turn brown quickly, which is called enzymatic browning of food.

So apples will change color after peeling for a period of time. Not only apples, pears and some vegetables (such as potatoes, eggplant, etc. ) This is also the case.

Browning affects the appearance of food and reduces the nutrients in the outer layer, but it is still edible. If the apple is peeled and left for a long time, the oxidative decomposition of plant cells in the air will be intensified, and the nutrients in the outer layer of the apple will be decomposed more. Pectin will be further decomposed into pectin and methanol under the action of enzymes, which will make the pulp loose, wet, discolored, stale and even rotten.

The detective in the book saw that the fracture of the apple was still fresh, and of course he knew that his son had just eaten the apple. Is there any way to keep apples from rusting? I did two experiments. One is to soak apples in lemon juice. The second is to soak apples in salt water.

I first soaked the apple in salt water and made a simple experiment. I went to the kitchen to mix a glass of salt water, brought an apple, and then cut it and put it in salt water.

After I finished, I quietly watched the color change of the apple. I've been waiting for a long time, but the cut apple hasn't changed. It seems that the method written in the book really works.

I did the second experiment carefully and observed the difference between putting apples in the air and putting lemon juice. I took out an apple, cut it in half, put half on the table and the other half in lemon juice.

I left them in place and observed their changes respectively. I made a list: Time/Situation: Apples put in salt water were put in the air, and apples put in lemon juice 10 minutes became a little dark, and nothing changed. Most of them turned black for 20 minutes, and there was no change. All of them turned black for 30 minutes and turned yellow for 40 minutes. It's a little dry, and some yellow spots turn a little yellow after 20 minutes. From the knowledge I have learned from "100,000 Why", I have come to these conclusions: apples will "rust" in the air, because when the peel, that is, the "protective wall" of the fruit is removed, oxygen will enter the interior of the fruit, and then react with some compounds in the fruit, usually embedded in these compounds to oxidize it.

These oxidized compounds will appear brown and black, so if you put the cut apple on the table, it will "rust". But the half placed in lemon juice is not easy to turn black, because citric acid is easily oxidized, so it can be used to deoxidize apples, so apples soaked in lemon juice are not easy to "rust".

However, no matter which method is used to preserve the peeled apple, the original vitamin C in the fruit will be lost more or less, so it is best to peel the apple as much as you want when eating it, and eat the peeled fruit as soon as possible. I didn't expect chemical reactions to occur anytime and anywhere in our lives. It seems that I have to study science well to explain more phenomena in my life! Next time you eat an apple, you must remember to eat it all at once, so as not to make it rust.

5. Observe the color change of apples. Once our family went to the Imperial Hotel in Dalingshan for dinner, we accidentally found two chameleons in the lobby. My brother and I looked at them curiously. The chameleon has a triangular head and prominent eyes. Strangely, the eyes can rotate independently, and its tail is long and coiled in a circle, and the color is bright green.

The chameleon is put in a transparent glass box. There are many pebbles under the glass box with a thick branch in the middle. I saw the chameleon slowly climb to the branch, and suddenly the color of the chameleon changed to the color of the branch. My brother and I were surprised. After a while, it climbed onto the small stone. Wow! It suddenly turned into the color of a small stone. My brother and I both have this question: will it change color? I still have this question today, so I looked it up online: chameleons can change all kinds of colors, and the mechanism of color change is; The autonomic nervous system controls cells containing pigment particles (melanocytes) to spread pigment in one or more cells.

Many species can turn green, yellow, beige or dark brown, usually with light or dark spots. The change of derivative depends on environmental factors, such as light, temperature and mood (surprise, victory, failure).

The strange animal-chameleon is really interesting.

6. Write a composition and observe apples. It takes 800 words. Thank you.

It's really boring to be alone at home. I picked up a book at random, and a short story in it attracted me. This little story is about a father who is a detective. He told his son to take a nap, but he didn't listen and hid in the room to eat apples. When the father walked into his son's room, his son hurried to bed and pretended to sleep. The father looked at his son's leftover apples and saw through them at a glance. He said, "Get up, I know you are pretending to sleep." The son stood up obediently when he saw that his father had found out. I am very confused in my heart. How did the detective find his son pretending to sleep?

I took another big apple to eat myself, but I was in a hurry to watch TV, so I took a few bites and put it on the table. I want to eat later. When there is an advertisement on TV, I want to finish the apple I just ate. Huh? The apple I just ate suddenly turned black. Like to rust, why? No, I have to make a thorough investigation. Composition Network home.sanwen8.cn

It turns out that when apples are peeled, phenols in plant cells will combine with oxidation in the air under the action of phenolase to produce a large number of quinones. Neoquinones can make plant cells turn brown quickly, which is called enzymatic browning of food. So apples will change color after peeling for a period of time. Not only apples, pears and some vegetables (such as potatoes, eggplant, etc. ) This is also the case. Browning affects the appearance of food and reduces the nutrients in the outer layer, but it is still edible. If the apple is peeled and left for a long time, the oxidative decomposition of plant cells in the air will be intensified, and the nutrients in the outer layer of the apple will be decomposed more. Pectin will be further decomposed into pectin and methanol under the action of enzymes, which will make the pulp loose, wet, discolored, stale and even rotten. The detective in the book saw that the fracture of the apple was still fresh, and of course he knew that his son had just eaten the apple.

Is there any way to keep apples from rusting? I did two experiments. One is to soak apples in lemon juice. The second is to soak apples in salt water. I first soaked the apple in salt water and made a simple experiment. I went to the kitchen to mix a glass of salt water, brought an apple, and then cut it and put it in salt water. After I finished, I quietly watched the color change of the apple. I've been waiting for a long time, but the cut apple hasn't changed. It seems that the method written in the book really works. I did the second experiment carefully and observed the difference between putting apples in the air and putting lemon juice. I took out an apple, cut it in half, put half on the table and the other half in lemon juice. I left them in place and observed their changes respectively. I made a list: Time/Situation: Apples put in salt water were put in the air, and apples put in lemon juice 10 minutes became a little dark, and nothing changed. Most of them turned black for 20 minutes, and there was no change. All of them turned black for 30 minutes and turned yellow for 40 minutes. It's a little dry, and some yellow spots turn a little yellow after 20 minutes.

Observe the above changes, plus from. From the knowledge I have learned from "100,000 Why", I have come to these conclusions: apples will "rust" in the air, because when the peel, that is, the "protective wall" of the fruit is removed, oxygen will enter the interior of the fruit, and then react with some compounds in the fruit, usually embedded in these compounds to oxidize it. These oxidized compounds will appear brown and black, so if you put the cut apple on the table, it will "rust". But the half placed in lemon juice is not easy to turn black, because citric acid is easily oxidized, so it can be used to deoxidize apples, so apples soaked in lemon juice are not easy to "rust". However, no matter which method is used to preserve the peeled apple, the original vitamin C in the fruit will be lost more or less, so it is best to peel the apple as much as you want when eating it, and eat the peeled fruit as soon as possible.

I didn't expect chemical reactions to occur anytime and anywhere in our lives. It seems that I have to study science well to explain more phenomena in my life! Next time you eat an apple, you must remember to eat it all at once, so as not to make it rust. composition

7. How to write the composition of Apple's transformation? The prepared fruit is really colorful! Look at the sparkling grapes like shining pearls; That red apple seems to be a smiling face; That-that's countless! Seeing that I was dazzled, I quickly took out my carefully prepared fruits, two fragrant pears, a kiwi fruit and a bunch of grapes. I looked at the fruit and began to worry: "What will I do in the future?" ? A chicken? A little too simple; A panda? Alas, no, my fruit is neither black nor white; A mouse? Well, that's a good idea. That's settled! "

Art teacher Zhang strode onto the platform and said, "Today I'm going to have a big fruit transformation, and I'll go on stage when I'm done." As soon as the teacher finished speaking, everyone began to get busy. I thought about it, how to be a mouse? Suddenly I had a brainwave and thought of it! I took out a fragrant pear, put two toothpicks in its head, and put grapes on it. It looks like a pair of agate ears. Is it time to make eyes or grapes? Ha ha! I have never seen a mouse with ears and eyes. Just dig two holes in its eyes. I really like it! I started doing my nose. I've seen mice with sharp noses, or should they screw a hole? No, it will be confused with your eyes. Make it from grapes, too! I'll take off the toothpick first, and then insert the grapes. I'd better dig a crescent hole in my mouth, but I picked up a toothpick and drew a moon here in my mouth, and the preparation for my head was finished. Next, the tail is a big problem. The tail can't be made of grapes. The only thing left is a toothpick, but the toothpick is straight and the mouse's tail is bent! Now I'm in big trouble. I am trying to think. What should I do? Can toothpicks bend? Haha, yes, I picked up a toothpick and made it into an arc. When I put my tail on it, a little mouse glowed everywhere in the room. Looking at my own work, I feel something is missing, oh! By the way, there are still four mouse feet missing, and I inserted four toothpicks. Wow! A lifelike little mouse appeared in front of me.

Write a composition about why apples change color. Yesterday, my aunt and brother came, and my mother bought a big bag of apples.

After dinner, mother peeled apples for everyone to eat. My brother and I have been playing computer games and forgot to eat. For a while, the originally bright white apple meat turned light brown, and for a while, it turned dark brown. "What is the reason?"

Today, I found the encyclopedia for teenagers and found the answer in it. This is because there are phenols in apples to maintain respiration. When apples are peeled, phenolic compounds in plant cells will be combined with oxidation in the air under the action of phenolase to produce a large number of quinones, and new quinones can make plant cells turn brown quickly. It is mainly used when peeling apples. Tannic acid in apple flesh reacts with iron in the blade to form black iron tannic acid covering the surface of apple flesh. When apple is peeled, the pulp meets the air, and the organic matter in the pulp is oxidized and discolored under the catalysis of oxidase. So peeled apples will change color.

But you don't have to worry. Although the peeled apples are discolored, as long as they are kept for a long time, such apples will not affect their health. One thing to pay special attention to: tannic acid in apples is difficult to dissolve in water, so don't wipe it with a handkerchief or towel after eating, okay?

In addition, I'll tell you a coup: drop some lemon juice on the sliced apple, which won't change color and keep the original flavor. Some fruits that are easy to change color can also be treated in this way, and the effect is good.

There is indeed science everywhere in life. Only by constantly learning and exploring science can society make continuous progress! Apples will change color after peeling. I not only have a little knowledge, but more importantly, I understand how wonderful nature is!

9. How to write an essay about apples There are many kinds of fruits, such as watermelon in fruits, litchi in fruits, grapes in pearls in water … but I like apples best.

Apples are round, as big as oranges. All wet. There are no mature apples, and the green ones gradually occupy the green "territory" from red. Finally, the apple ripened and turned deep red. When you take a bite, the undercooked apple tastes bitter and astringent. Cooked, it smells fragrant, and I can't wait to eat it all. My Sweetie's disease makes people want to eat more and more. The more they eat, the more they like to eat. When the apple is cut, the meat is white, the seeds inside are black and the juice is fresh. The whole apple tastes sweet, crisp and delicious, and the pulp is delicious. The taste, color and shape are pleasing, round, like a small lantern.

Apples not only taste good, but also have many functions.

Eating apples often can reduce blood fat, blood pressure, prevent cancer, have anticancer effect, strengthen bones, maintain acid-base balance and lose weight. There is a western proverb: "An apple a day keeps the doctor away." Among many fruits, apple is the most common and peaceful one. But its nutritional value doesn't allow me. Among many fruits, apple is the most common and peaceful one. But its nutritional value should not be underestimated. Chinese medicine believes that it can nourish the lungs, strengthen the spleen and stimulate appetite. Nutritional analysis shows that apples contain many kinds of fructose, organic acids, pectin, trace elements, cellulose, vitamins, minerals, polyphenols and flavonoids. "An apple a day" is a well-known health slogan, and apples are called "all-round healthy fruits" by scientists.