Current location - Education and Training Encyclopedia - Graduation thesis - Composition of plants in the fourth grade of primary school
Composition of plants in the fourth grade of primary school
In daily life or work and study, everyone has written a composition, so you must be familiar with all kinds of compositions. According to different genres, composition can be divided into narrative, expository, practical and argumentative. How to write a thoughtful and literary composition? The following are nine essays on plants in the fourth grade of primary school that I collected and sorted out. Welcome everyone to refer to it, I hope I can help you.

There are three camphor trees and a pine tree in front of my house. There are many saplings under the tree. I think they must be their children!

Cinnamomum camphora is tall and lush, standing in front of the door like a patron saint. Compared with it, pine trees are much smaller, which is not surprising, because pine trees are much younger than camphor trees. From generation to generation, camphor tree is still the aunt of a pine tree.

One day, I suddenly found a lot of bugs on the branches of pine trees. I looked at the camphor tree again. There were no bugs on it. This phenomenon makes me very confused. Not long ago, I found the answer from "100,000 Why". It turns out that the tree itself has a fragrance, which is the bane of insects, so insects dare not climb the camphor tree. The mothballs we use now are made from the bark of camphor trees. Placing mothballs in the wardrobe can protect the "safety" of clothes.

It seems that plants are really good friends of mankind! I decided to plant this tree in my yard and let it spread all over the world clean and fresh, right?



There are countless flowers in the world. Some people like expensive gladiolus, others like colorful chrysanthemums, but my idea is different from everyone else's. I like plum blossoms standing in the snow best.

I remember it was a winter, and my mother and I went to my grandmother's house to see plum blossoms. I wonder how plum blossoms bloom in such a cold day in winter. I was shocked at the moment I saw it. Plum blossoms are so beautiful. Its petals are petite and exquisite, and the colors are red and white respectively. The leaves are ovoid, ovoid, 4-8 cm long and 2.5-5 cm wide, with strong fragrance at the apex and tail tip, which opens before the leaves and gradually falls off when growing.

Suddenly, a cold wind blew, and the plum blossoms scattered all over the floor, leaving only a few flowers on the plum tree. It turned out that the beautiful scenery was so short that I cried sadly. My mother said to me, "Don't feel bad, it will be brand-new in a month."

Why is plum blossom so beautiful? What does it tell us? "The blade comes from sharpening, and the plum blossom fragrance comes from bitter cold!" After my introduction, are you eager to see its beauty?

Do you like asparagus, children? Let me introduce you, if you like.

There is a pale yellow tray below, and next to it is a delicate and unique rockery, made of some ivory stones, like the precious inkstone in Four Treasures of the Study. Asparagus leaves are very dense, as lush as spikes and covered by layers. Asparagus grows luxuriantly, like a towering tree, standing in the vast mountains and clouds.

Asparagus can not only be enjoyed by people, but also has many benefits for people. Asparagus can not only improve cultural literacy, but also regulate liver disease, mental depression and depression. Asparagus can not only absorb harmful gases such as chlorine dioxide at night, but also secrete gases that kill bacteria, reducing the occurrence of infectious diseases such as colds and typhoid fever, which is of great benefit to human health.

Asparagus is not only so beautiful, but also has many benefits for people. We must take good care of it! It is a symbol of great ambition, it is a beautiful angel!

Shanghai Botanical Garden is a comprehensive botanical garden integrating scientific research, popular science and sightseeing. I have long wanted to feast my eyes, and this spring outing finally got my wish.

Under the guidance of the teacher, we came to the botanical garden by bus. As soon as I entered the door, the grassy lawn and the flowers all over the mountains came into view. Take another look, there are all kinds of flowers here: purple bougainvillea swaying in the wind, red tulips standing gracefully among the flowers, pink morning glory blowing "trumpet" happily ... flowers of all shapes and sizes dancing happily in the wind.

We went out, passed the medicine garden, crossed the small bridge and finally came to the largest exhibition greenhouse. There are almost all kinds of plants there, which dazzle us. The legendary mango tree, longan tree and "blood-sealed throat" appeared before our eyes. Seeing the name "congestion throat", I took two steps back in horror. Later, when I saw the explanation, I realized that once its sap entered the wound, it might lead to death. In the past, hunters used it to hunt!

There are also veritable overlord trees and dragon blood trees in the greenhouse. The mighty overlord tree stands upright with its head held high, and the sharp thorns on its trunk are particularly obvious, like warriors in armor. If you catch the dragon's blood tree, it will secrete juice as red as blood.

In another small greenhouse, Nepenthes attracted me. It is said that it eats small insects. No wonder there are no small flying insects here. I want to see it eat worms and understand how it eats. Hey, this is the biggest regret of the spring outing!

Happy times are always so short. I really want to go to the botanical garden again and study the plants well.

In mid-April, I planted all kinds of vegetables in the flowerpot on the balcony, namely: cucumber, mung bean, sweet orange pepper and sweet potato leaves. ...

With the passage of time, some germinated quickly and grew seedlings, while others germinated slowly. However, we called for a thousand times and urged her for a thousand times before she began to come to us! The leaves of orange sweet pepper are small and sharp; Sweet potato leaves are large; Mung bean seedlings grow fast and tall ... I am ecstatic to see them all sprouting. Soon, I found mung bean seedlings staggered, bent in frustration, looking weak and not frightened. I'm surprised and worried. I don't know why.

I am very upset because I can't find the reason. Occasionally, I heard teacher Zhu say at school: "If the plants grow crooked, it may be because there is not enough sunshine;" It may also be because the seeds are too dense and the spacing between seeds is too small. "After listening to Mr. Zhu's words, I thought about it carefully: I planted mung bean seeds with appropriate spacing, but the seat by the wall may not be sunny enough and grow crooked. After finding out the reason, I moved the mung beans to the roof according to Teacher Zhu's words, and let them enjoy sunbathing beautifully. After two or three days, mung beans really grow much taller and more energetic than before, like a tall and straight soldier. Seeing that mung beans are growing better and better, my mood finally relaxed. I'm really happy about it.

Through this planting, I learned more about the characteristics of various vegetables and learned to plant them according to their living habits.

Yesterday, the teacher took our grade one and grade two children to the botanical garden for a spring outing. Although it is a little far from the school to the botanical garden, the students still talked and laughed all the way.

The most striking thing in the fields on both sides of the road is golden rape flowers, just like yellow squares sewn on the green carpet. The spring breeze changed the mountains on both sides of the road into green clothes, and the clear river flowed quietly along the road, and the petals were sprinkled all over the river.

After a long walk, we finally came to the botanical garden. The peach blossoms in the botanical garden are in full bloom, which looks like a pink sunrise from a distance. Gorgeous Chinese rose flowers are also blooming, one after another. These flowers are like taking part in a beauty contest. Not far from the pond, fish are chasing and playing, and groups of tadpoles are looking for their mother. The willows by the pond have new leaves and long green braids are swinging in the wind. A gust of wind blew, and all the leaves in the forest fell like purple butterflies flying all over the sky. How can leaves fall in spring? When I look at these fallen leaves carefully, they are all purple. I think it's Sister Feng Chun changing clothes for the little tree.

We are tired from walking, so the teacher and we have a rest in this small forest. Several students are playing cards. Although they are small, their brains are very flexible. Several children are flying kites together. One is holding a kite and the other is running. Although I haven't succeeded in flying for a long time, I am still very happy. Other children just lie on the grass and sunbathe. ...

The botanical garden is really beautiful in spring, and it is even more beautiful with us.

Waist, that's interesting.

The bell rang and the teacher appeared at the door of the classroom. No one noticed. He has a little yellow thing in his hand. Take a closer look. Ah! It turned out to be a lovely duckling, all yellow and shining in the light, very beautiful. His mouth is open, and I seem to hear the duckling croak all the time. When we walked in, we saw that the duckling was still hunched with three succulents on its back!

A succulent plant with purple outside and green inside looks like a blooming flower. A group of succulents, one after another, are somewhat like cylinders. They seem to have lost their palms, leaving only a few poor fingers. The last one, which is closest to the duck's head and taller than the duck's head, is a kind of "mini" cactus with some hairy thorns on it, which is soft to the touch and does not prick the hand at all. I stared at the meaty pot, and suddenly, my eyes lit up and I found the "New World". There is a cushion under the nothingness of cactus. I think it is because of that thing that those things will grow into "mini" cactus!

What a strange can of meat!

Friend, do you want to see rare plants all over the country? Do you want to enjoy the idyllic scenery of Italy? Want to feel the layout of French court gardens? Do you want to browse the stretched pictures in English style? Please come to Beijing Botanical Garden. The scenery here is very charming.

As soon as you walk into the picturesque Beijing Botanical Garden, you can't help being deeply attracted by the scenery in the garden. Be careful, don't get lost, because there are more than 200 hectares of botanical gardens, which are divided into more than a dozen small plant areas: tropical rain forests with spring-like seasons, thrilling desert gardens, bright and dazzling gardens, magnificent forests ... each garden is full of beautiful, lush trees and all kinds of * * *. Coupled with a variety of exquisite sculptures, exquisite pavilions, lifelike bridges and flowing water, as well as a variety of rare medicinal plants, hidden in red flowers and green trees, people linger.

Moreover, there are many places of interest in Beijing Botanical Garden, such as the reclining Buddha Temple, the former residence of Cao Xueqin and the tomb of Liang Qichao, which attract Chinese and foreign tourists to visit.

I like Beijing Botanical Garden very much. It is all-encompassing and brings together fine plants from all over the world. I believe you will like it as much as I do after reading it.

I like a plant called "succulents". My mother keeps many such plants, which we affectionately call "succulent flowers".

Most fleshy flowers are lotus-shaped, some are crystal clear as jade, and some are smooth and tender if frozen. Sometimes I can't help but want to pinch them, because they are really cute.

Their names are interesting, some are Chihuahua, some are Xiong Haizi, and some are Moon Rabbit Ears. Chihuahua is as cute as Chihuahua, Xiong Haizi's leaves are like bear's claws, and the moon rabbit's ears really stand up like rabbit's ears. It's amazing!

Mom said that succulents, whose hometown is in South Africa, are natural wild plants. They grow on barren sand and have super vitality! Natural drought makes them instinctively store water, and meat changes with the seasons to make their leaves colorful, so they become more beautiful. The leaves of succulent flowers, like flowers, have a nice nickname "flowers that never fade", which is also the reason I like them.

My mother takes care of these little creatures every day and gives them plenty of sunshine and ventilation. My mother said that only in this way can meat grow well. Coupled with the beautiful flower arrangement device, it is simply a work of art.

I think I should learn from the tenacious spirit of succulents, overcome difficulties, study hard and be an excellent student.