Eighth grade expository essay sample

Explanation: Bee

I am a little bee. We bees live in groups. There are three types of bees in a bee colony: a queen bee, a few drone bees and thousands to tens of thousands of worker bees. I am one of these millions of worker bees.

My mother is the queen bee. She has the largest body and has almost lost the ability to fly. It doesn't matter, it has thousands of children, and we can support it, which is considered as our filial piety! In my family, only the queen bee can lay eggs, and she can give birth to 15,000 to 20,000 to 20,000 to 20,000 to 20,000 to 20,000 to 20,000 to 2,000,000 to 2,000,000 to 2,000,000 to 2,000,000,000,000,000,0,0,00,0,00,0,00,0,0,0,0,0,0, etc. Ten thousand brothers. The lifespan of a queen bee is about three to five years. In our family, she can be said to be the longevity star.

There is another kind of bee in the bee colony called the drone, which is very different from us. It is "tall and big" with a thick body and long wings. Its duty is to mate with the queen bee. After mating, it dies. ?To say that we, the worker bees, have the largest number and the greatest responsibilities in the family. We are the main members of the bee colony and have the heaviest work: collecting pollen and nectar, brewing our "rations", nurturing our brothers, feeding our mothers, building our houses, protecting our homes, regulating indoor temperatures and Humidity... Don't look at it like this, our bodies are very weak, and our life span is only six months, just like meteors in the sky - fleeting, with only a little time to shine. ?

We bees are the most industrious in nature. During the flowering season, we are so busy that we forget about morning and evening. Sometimes we take advantage of the moonlight to collect flowers and make honey. Honey is difficult to brew. To brew one kilogram of honey, we must collect raw materials from 1 million flowers. If our hive is one and a half kilometers away from the flower bush where honey is collected, then we have to fly 450,000 kilometers to collect one kilogram of honey, which is almost equivalent to flying around the earth's equator 11 times. It seems that our achievements are not inferior to those of "Apollo"! Although it is difficult for us to collect honey, a swarm of bees can harvest dozens of kilograms of honey every year. Our compatriots in Guangdong are busy all year round. If the animal world is also organized, then we bees will definitely win the "Most Loved Labor Medal".

Perhaps you want to ask: In the boundless nature, how do you know which plants are blooming and flowing nectar? Let me tell you, we have many "detectives" who send them to scout, and then come back to investigate The result tells the companion that our "language" is dance. ?

Our family is like this. Our lives are short, but don't worry, we still have brothers and successors. They will continue to work just like us. Our family continues to multiply like this.

Our school Our school is located next to a beautiful river.

When you walk into the big iron gate, the first thing you see is the green upper playground. In the middle of the upper playground is a straight avenue dividing the north and the south. On both sides of the avenue are two rows of low apple blossoms. Several rows of dense pines and cypresses are planted on the south side of the avenue. Through them, you can vaguely see the new staff dormitory, and there is a reservoir behind it. There are several tall evergreen and deciduous trees on the north side of the avenue. The toilet is hidden under these big trees and looks a bit breathable.

Walk east (front) along the upper playground avenue and go down a short section of cement slope to the middle playground. It is rectangular in shape and surrounded by a circular runway. A row of short and neat yellow beams are planted on the south side of the runway, and tall and straight neem trees are planted on the north side. In spring, they are full of purple-red flower clusters and have a bit of fragrance. , in autumn, the trees are covered with strings of green pearl-like fruits, which look extremely beautiful from a distance. There is a large sandpit in the middle. Whenever a school sports meeting is held, this is the busiest place because it is a stage for young athletes to show off their heroic deeds. The most conspicuous thing is the high-flying five-star red flag facing the school gate in the east outside the runway. Under the red flag, there are six round cypress trees lined up like neat flag guards. The most inconspicuous thing is the two cement table tennis tables standing silently in the west corner. To the south of the outer periphery of the runway is a row of dormitories, facing north and arranged in an east-west direction. To the west is the teachers' dormitory area, with cypress trees in front of its door. The lights in the teachers' dormitories are always on in the dead of night. I think this is because the teachers are working hard to prepare lessons and correct homework for us!

Walk eastward along the corridor of the teachers’ dormitory to reach the boys’ dormitory. At the end is a row of girls’ dormitories. It faces east to west and faces the school gate. This is where we live. From this space, cheerful singing, laughter, and conversation came out, but the sound of beatings and scoldings was also indispensable. Behind is the canteen, where a charitable grandma cooks for us. We feel a little bit happy when we eat the food that the grandma cooks for us every day.

There are three concrete stairs on the north side of the runway. After going down the stairs, you will reach the teaching area. This is a tall teaching building, facing south with plenty of light, and with a beige appearance. It is divided into three floors. A wide staircase in the middle divides it into two. The west side is full of classrooms: the first floor is for the third year of junior high school. The second floor is for the second grade of junior high school, and the third floor is for the first grade of junior high school. Each classroom has an area of ??56 square meters. The wide doors and windows illuminate every corner. There is a blackboard at the front and rear of the room. There is a national flag and class motto above the blackboard. , four fluorescent lamps hang from the ceiling, and thousands of talents have been cultivated here. To the east are the supporting buildings for teaching facilities: the first floor is the office, where teachers work, and the second floor is the physical and chemical laboratory, where there are many experimental instruments, and our physical and chemical experiments are conducted here.

The third floor is the computer room. Fans are hung on the four corners of the room to prevent the computer from heating up. The windows are covered with beautiful curtains to prevent the sun from shining on the computer. For its safety, an anti-theft net is installed in the corridor. There are a few flower pots, but the flowers are gone. Our information class is held here. It seems to be full of modern atmosphere.

Go east from the teaching area and go down a few steps to reach the cement basketball court. There are two standard basketball stands on the court, and there is a scoring blackboard on the wall. On both sides of the blackboard are written "Friendship first, competition second" in large characters. There are also two table tennis tables to the west of the basketball court. Boys have to show off their skills here every time after class, so this is the "entertainment paradise" for boys.

Year after year, the trees on campus change their leaves countless times, becoming more handsome and taller with each change. Our school is becoming more and more beautiful and prosperous.

Our Classroom

Our classroom is on the third floor of the school. It was a brand new and tidy classroom. As you approach the classroom, you will see a dark blue door. It was a relatively high-end door. When you walk in the front door, you can see a TV in front of the blackboard on the south side. Every ten minutes before class in the afternoon, it will play a program for us to enjoy. There is a bulletin board on the wall to the left of the front door. There are timetables, student rotations, class schedules... There is a beautiful little angel in the middle. She has golden hair, holds a red heart in her hand, and spreads a pair of green wings. She is so cute! There are four switches under the small bulletin board. They control fans and lights. There is a piece of paper taped underneath. The paper announced the list of compositions we published on the primary school student composition website.

There are windows on the north and south sides of the classroom. The windows were so transparent that they looked as if they had no glass at all. That’s the result of wiping it every morning! There is a curtain on each window to block the bright light. There are two empty walls between the windows. The walls are posted with daily behavioral norms for primary school students and some famous quotes.

There is a desk at the front of the classroom. There are chalk boxes, teaching aids and other things on it. There is a large blackboard at the front and back. The blackboard in front is used by the teacher to teach us. There is a radio above. Whenever something important happens in the school, it will ring and tell us in time. There are eight big characters on both sides: "Active, lively, willing to learn, and thoughtful." That is our school motto. The blackboard at the back has our blackboard newspaper. We change it every half month. The colorful decorations above are very beautiful. The above articles are all written by ourselves. We love it. After class, especially at noon, we like to take a look there.

Look, how beautiful, how beautiful and how neat our classroom is!

The kitten

The chubby body is covered with long white hair, as if wearing a snow-white fur coat. There is a pair of copper bell-like eyes embedded in the round face, a pair of triangular ears standing on top of the head like two small rice dumplings, and a few silver-white beards growing on both sides of a small mouth. The thick and long tail, like a big braid, swung back and forth behind it. This is it, our cute kitten - Huanhuan.

"Huanhuan" is both naughty and clean. Once, I accidentally knocked a table tennis ball off the table. "Huanhuan" thought it was a mouse that dared to invade. "Huanhuan" immediately raised his beard when he saw it, moved a few steps back slightly, stared at the "mouse" closely with his two big eyes, slowly bowed his waist, raised his tail high, and said "meow" With a sound, he quickly pounced towards the "mouse". No wonder everyone says cats are great at catching mice. Another time, my father brought back some small fish. "Huanhuan" smelled the fishy smell and ran over quickly, staring at the fish in the basin and sticking out her tongue. It kept shouting "meow--meow" in its mouth, as if to say: "Little master, 'I'm hungry!' I caught a fish and threw it to it. It took the small fish and walked to a place where no one was there. , and ate it with relish. After eating the fish, it carefully washed its mouth with its paws and said, "Little guy, you are quite hygienic!" ".

"Huanhuan" is very good at playing coquettishly. One day at noon, I was sleeping and felt my fingers were itchy. When I opened my eyes, I saw "Huanhuan" was licking my fingers. I I hugged "Huanhuan" and fell asleep together.

"Huanhuan" is so naughty and cute, why don't you like it?

Dog? >

Dogs come in all shapes and sizes, are rich in color and variety, and are flexible in nature. They are endearing animals.

Dogs have straight facial features like humans, and their limbs are sound. They walk, swaying, and are extremely happy. Generally, the length of a dog is about eight decimeters, and its weight does not exceed 35 kilograms...

The colors of dog hair are colorful. , and the varieties are countless. The colors of dog hair are mainly black, yellow, and white, and some are black and yellow, yellow and white, and black and white... It is said that the color of dog hair is related to its nature: black sticks to it. The door is as fierce as a tiger; the yellow one looks like a wanderer, coming and going freely; the white one is innocent and lively, and obeys every word... According to statistics over the years, dog breeds account for about a quarter of the total number of animals in the world; among them, the "Shar Pei" is ours Dali’s famous dog breed.

About 500 families have adopted this kind of dog...

Dogs are flexible by nature. There is almost no dog in the world that is demented and does not like to eat or play. However, dogs are very responsive. When seeing the appearance of mice, insects and ants, dogs will show off their skills and quickly capture the "prey" they are watching; within the dog's sight, almost no "prey" can escape their "five-finger mountain".

Dogs are not big eaters, but they are very picky. The food intake of dogs every day is about one-third of that of humans. They only eat fish, meat or other bones, and they do not like to eat most vegetables and fruits...

The intelligence of dogs is lower than that of lower animals. It is also extraordinary in the world, being one-quarter of the intelligence of higher animals - "human beings". Dogs that have been artificially trained can perform many difficult actions: catching tiny objects dropped from higher altitudes with extreme accuracy at low altitudes; standing on tiptoe on one foot, holding human hands with both hands, and acting like friends when dealing with humans... …

Dog--a good and intelligent animal that everyone loves.

Lotus

Lotus is also known as lotus and hibiscus. It has many varieties. According to an article, it includes thousand-leaf lotus, four-sided lotus, and head lotus. There are four-season lotus and night-shu-he. The leaves of night-shu-he stretch out at night and close during the day. Lotus likes places with water, and most of it grows in ponds.

The lotus has a wide range of uses. It can be used for food, medicine and ornamental purposes. Lotus seed contains a lot of starch and is rich in nutrients. Peel off the lotus pod, and the lotus seeds look like jade. Then peel off the outer skin and a thin film, and you will find the snow-white and delicious lotus seed kernels inside. Lotus root is a delicious vegetable that contains various vitamins, proteins and other ingredients. It can be eaten as a fruit or cooked and eaten.

Lotus is also a valuable traditional Chinese medicine. I learned from my mother and an article that lotus leaves can relieve heat and relieve heat; lotus stems can ventilate and widen the chest; lotus petals can cure summer heat and polydipsia; lotus seeds can strengthen the spleen and stop diarrhea; lotus heart can clear fire and calm the mind; The liver can remove blood clots and stop bleeding; lotus root joints also have the function of detoxifying alcohol! From leaves to stems, from flowers to fruits, everything is truly medicinal.

Lotus is a flower that greens, beautifies and purifies our environment. Looking at it from a distance, you can see "the lotus leaves touching the sky are infinitely green, and the lotus flowers reflecting the sun are uniquely red." Looking up close, the lotus leaves are dotted with green waves, swaying in the wind, and graceful in the absence of wind.

Since ancient times, there have been countless praises of lotus in poems and articles, and "it emerges from the mud but is not stained, and washes through the clear ripples without being evil." This sentence is what Zhou Dunyi said about the lotus in "The Love of the Lotus" It praises the character of a gentleman, and it also praises it from the noble character of the lotus.

No flower can compare to the lotus for its wide range of uses and high character. It contributes everything it has to mankind without reservation.

Chrysanthemum

Chrysanthemum is a perennial herb that blooms in autumn. It is artificially cultivated and comes in many varieties with large colors, shapes and sizes. Some flowers can be used as medicine or as drinks.

The stem of the chrysanthemum is dark green, about as thick as a little finger. There are many feathery leaves growing interlaced on both sides of the stem. These leaves are emerald green. From a distance, the whole chrysanthemum is emerald green. Yes, very endearing.

Every autumn, chrysanthemums will bloom. As the saying goes: "The fun of appreciating chrysanthemums lies in appreciating the flowers." The colors of chrysanthemums are colorful, with yellow, white, red and purple being the main ones. The yellow is golden and brilliant, graceful and luxurious; the white is wrapped in light makeup, clean and elegant; the red is gorgeous and passionate, and the purple is vigorous and powerful, dignified and thick. Some flowers are green and verdant, really like jasper, and there are also red and yellow flowers, which are pleasing to the eye. There are all kinds of colors, which are dizzying and dazzling.

The flower shapes of chrysanthemums are also various, with different styles. This is due to the various shapes of petals. There are several types of valves, including flat valves and tubular valves, each of which has incurved, recurved and other forms. A flower consists of many petals combined according to certain rules to form chrysanthemums of different shapes. Each chrysanthemum maintains a uneven beauty of the same density. Several beautiful shapes are formed from this: some flowers have short petals hugging each other, and long petals on the outside, which are very natural and unrestrained; some flowers are loose or tightly hugged inside, and the outside naturally droops, slim and graceful; The petals are of different lengths, overlap each other, and are arranged in various ways...

Chrysanthemums are not only gorgeous and colorful, but also versatile. Flowers, stems, leaves and roots can all be used as medicine. Chrysanthemums can also be used to make chrysanthemum tea. Chrysanthemum tea is refreshing and refreshing, and has a pleasant fragrance and is deeply loved by people. Chrysanthemums also have the function of protecting the environment and purifying the air. They are good green plants.

Chrysanthemum is both beautiful and practical. It is really a good flower.

Written Box

I have a beautiful writing box. My sister bought it for me on New Year's Day this year. Its outside is sky blue. There is a painting on the top of the box. There is a handbag in the painting. There are small houses on the bag, a few big green trees, and a naughty kitten next to it. The little kitten was biting its tail and playing. There is a big cat next to it, which may be the mother of the kitten. It sat there blankly, motionless, as if thinking about something.

When you open the pencil case, you can see that it is a foldable three-layer pencil case. When it is closed, it will fold automatically. When it is opened, it will automatically show three levels, like a three-story building. There is a red shelf in the room on the top floor. Normally, it lies on the ground. When it stands up, it holds the book upright with the two grippers on the bottom floor, so that I can read and study more conveniently. On the middle floor, there are pencils, pens, ballpoint pens, erasers and other items. When I want to use the pen, I just need to tilt the pencil case slightly, and I can easily take out the stationery I need. I put tape and a ruler in the ground floor room. Usually, they lie in it and sleep. When I need them, they will come forward to help me do my work and complete my homework.

My pencil case seems to be a big family. Pens, pencils, rulers, erasers... are all members of this big family. They cooperate with each other to help me complete each learning task. . Follow me to school every day. Follow me home every day and do my homework with me.

My pencil case is so good. Therefore, I love my pencil case!

Snow

Snowflakes are beautiful crystals that cling together in groups as they fall to form snow flakes. The size of individual snowflakes usually ranges from 0.05 to 4.6 mm. Snowflakes are very light, weighing only 0.2-0.5 grams each. No matter how light and small the snowflakes are, or how wonderful they are, their crystals are all regular hexagonal shapes. Therefore, the ancients said that "there are five flowers in the grass and six in the snowflakes." How beautiful and light the snowflakes are! I like snowflakes more and more. It would be a joy to see the snow-covered earth and the green trees covered with silver again.

"Auspicious snow heralds a good harvest" is a widely circulated agricultural proverb in my country. In the north, a thick and loose layer of snow is like covering wheat with a quilt to keep out the cold. The nitrogen trapped in the snow is easily absorbed and utilized by crops. The low temperature of snow water can freeze to death overwintering pests on the surface, which also brings benefits to agricultural production. Therefore, there is another farmer's proverb: "Three layers of wheat quilt are used in winter, and steamed buns are used as pillows to sleep next year."

Snow has a wide range of functions, but snow has great benefits for human beings. First, it is beneficial to the growth and development of crops. Because snow has poor thermal conductivity, covering the soil surface with a layer of snow can reduce the transfer of soil heat and block the intrusion of cold air on the snow surface. Therefore, crops protected by snow can survive the winter safely. Snow also stores moisture for crops. Additionally, snow enhances soil fertility. According to measurements, every liter of snow water contains approximately 7.5 grams of nitrogen compounds. Snow water seeping into the soil is equivalent to applying nitrogen fertilizer. Using snow water to feed livestock and poultry and irrigate crops can yield obvious benefits.

Snow is good and bad for people. In the mid-spring season of March and April, it snows heavily due to a sudden cold wave. It will cause freezing cold. So the farmer's proverb says: "Wax snow is a treasure, but spring snow is not good."

Friends, after listening to my introduction, do you like and understand snow more?

How to make a "roly-poly"

Friends, have you ever seen an interesting "roly-poly"? Do you still want to know how to make a "tumbler"? Then let me tell you!

I first prepared all the materials and tools for making the "tumbler". The material is a relatively round egg shell or a table tennis ball. Get scissors, white paper, paintbrushes, candles, sand and a knife. With these materials and tools ready, you can make the tumbler.

I first carefully dug a hole on the top of the egg with a knife, then poured out the egg white and yolk bit by bit, then slowly put the sand into the egg shell, then lit the candle and put The wax is dripped on top of the sand. The purpose is to fix the sand so that it is heavy at the bottom and light at the top and will not fall over. Finally, find white paper, fold it into the shape of a hat, fix it with glue at the hole of the egg, and use a paintbrush to I drew two big round eyes on the hat, a big nose, and a small and exquisite mouth. A "roly-poly" was born in my hands. I looked at this "roly-poly" carefully. , pressed its forehead with my hand a few times, and it swayed left and right, its naughty look seemed to say to me: "I won't fall, I won't fall..." Looking at it, my heart was full of success. of joy.

An ordinary egg shell can turn into an interesting "roly-poly". During the production process, we not only cultivated our hands-on ability, but also enriched our after-school life.

The dangers of smoking

When I was two or three years old, my grandmother smoked frequently and got bronchitis. After my family and I tried to dissuade her, my grandma finally stopped smoking. My grandfather became seriously ill because of long-term smoking. From then on, grandpa never smoked again. In the past few days, I suddenly discovered that my brother also smoked. My mother and I told him not to smoke. He made up his mind never to smoke again, and my mother and I believed him.

I saw relevant information saying: "A cigarette can produce 500 milliliters of smoke. The smoke contains more than 3,000 chemical substances, of which more than 20 are confirmed to be carcinogens. The earliest origins are from tobacco. The extracted nicotine makes smokers intoxicated even if they become addicted.

Later, scientists isolated benzopyrene and methylhydrazine from cigarettes. They are both strong carcinogens. Long-term smoking will cause various types of cancer. Smoking also pollutes the environment and has an impact on the next generation. Cigarettes are also a chronic suicide poison. One cigarette can poison a mouse, and twenty cigarettes can poison a cow. "Some information shows: "A person who smokes sixty cigarettes in a row will die on the spot." Quitting smoking has become a worldwide trend, so the United Nations declares May 30th every year as "World No Tobacco Day"

< p> I thought: "It would be great if no one smoked in the world.

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