The fourth grade observation composition is 300 words.

In daily study, work and life, everyone will inevitably come into contact with composition. According to different genres, composition can be divided into narrative, expository, practical and argumentative. Do you know how to write a standardized composition? The following are nine 300-word observation compositions I have compiled for reference only, hoping to help you.

The fourth grade observation composition is 300 words 1 Although the ant is small, it is mysterious! During the National Day holiday, my friends and I went to my grandmother's house to observe this little thing.

Its body is divided into three parts: head, chest and abdomen. There are also an amazing number of species, including worker ants, soldier ants, male ants and queen ants. Seen from a close distance, it looks like a small dumbbell. No wonder it is so powerful. Besides, they have mouths and teeth! Rows of sawtooth let me refresh my understanding of it. Its use is very powerful. Can be used for self-defense, sawing things, a lot of patterns. However, it also has some disturbing aspects. That is, the A4 waist, for fear of its lumbar disc herniation.

The ants we observed have different shapes! There are jumping ants, hooligans and dull ants. Everyone is buzzing. As soon as I find a little ant with personality, I will report it to my grandmother and get her smile, indicating that it is very interesting. At this time, I found a martial arts master among ants, which is "Li Xiaoyi", especially it flies over the eaves and walks over the wall. I shouted, "Let's start the show"! It began to climb one meter from the ground, only to see a back flip and fall firmly to the ground. I touched it carefully, and it seemed to say to me, "Don't be infatuated with me! Everyone was so excited to see me that everyone looked at me with white eyes. So I can only play in the corner.

The ants in grandma's yard are really the pride of the yellow race. It turns out that a little creature has a personality!

There is a little white rabbit in my house, ah! What? You don't believe me, then go and have a look with me!

This white rabbit is a birthday present from my father. Because it's interesting, I call it interesting egg. "Interesting Egg" is one year and two months old this year. Although it's interesting, it's also cute. The "interesting egg" has two long ears and a pair of small eyes like hills on its head. Its inverted triangular nose is really interesting! Oh, and his little furry tail, shaking like a commander.

The little white rabbit is very interesting when eating. Whenever I put the dish down, the "interesting egg" will immediately push the leaves away and jump to one side. At this time, I went to the corner and leaned against the wall, carefully observing the activities of the "interesting egg": when I left, it jumped over and ate it with relish.

The white rabbit is also very interesting when sleeping. At about eight o'clock in the evening, Fun Egg will go to bed on time. "Funny egg" stood sleeping with eyes closed and ears closed, which made me think it was dead! What a false alarm.

The little white rabbit is also very interesting when playing games. Anyway, it's really interesting. Rabbit, you will always be with me.

In my hometown of Ya Dan, there are many pine trees, and even in the crevices of cliffs, their vitality is very tenacious.

The roots of pine trees are special. Its roots often stick out of the ground, some like dragons, some like snakes, and some like the vigorous hands of old people.

The pole of the pine tree looks scarred. Pine trees are straight, oblique and curved. When the weather is very hot, turpentine will flow out of the branches, and the insects will be wrapped by it if they are not careful. Maybe it will turn amber after a long time!

Pine leaves like to grow at the top of branches. Pine leaves are strange. They are like needles, and many "needles" together become a bunch of leaves.

In early summer, pine trees are blooming. The flower heart of Songhua is like a finger, and the "finger" is covered with pollen. Pine trees bear fruit in autumn, and there are pine nuts in the fruit that we like to eat. At this time, countless little squirrels are jumping around in the Woods, busy picking pine nuts.

In winter, all the leaves of other trees are lost, only the leaves of pine trees are still green and stand upright in the snow. Every time I see that pine tree, I can't help thinking of a poem:

The snow is loose,

The pine trees are tall and straight.

You know, loose and noble,

When the snow melts.

A few days ago, my father bought a pot of mimosa. It settled down in my yard, and it didn't take long to adapt to the new environment, holding out its chest and stretching its arms, which made it look extraordinarily energetic. The blue and white flowerpots are quite commensurate with the green ones, and the black soil is very noble and elegant. The mystery of mimosa

In the afternoon, I went to see my "baby". I touched it lightly with my hand. Hmm? First, close the small feathers of the mimosa one by one, then close the four feather shafts, and then the whole petiole hangs down. I was dumbfounded, so I asked my mother curiously, what the hell is going on? My mother only said that it was related to its name, and the specific reason was not clear. With questions, I finally found the answer from the book "Ask casually". It turns out that there is a bulging bag called "leaf pillow" under the petiole of mimosa, which is filled with enough water and feels very keen. When you touch its leaves with your hand, the water in the pillow immediately flows to both sides, the pillow collapses and the leaves hang down.

Mimosa wow! I must take good care of you, how much I love you!

There is a tree in my house that I can't name, so I put it in the corner of the living room.

Its roots are buried in a red flowerpot, and long vines grow out of the flowerpot and wrap around a post in the middle. There are bamboo-like knots on the vine, which are not as neat as bamboo, but this knot is a little protruding and that knot is a little concave. There are vertical stripes on the bamboo joints, which feel rough. There are some old vines, they keep climbing, and some of them are taller than the pillars, as if to show off themselves to everyone! There are also some young vines. Not only can they not climb up. Grow up, all on the ground, like a naughty child out of his mother's palm, sneak out to play.

Now let's look at the leaves! These leaves are piled together. From a distance, they look like an oasis. Take a closer look, yes! There are many small yellow spots on the leaves of melon seeds, just like there are many small freckles on the face of melon seeds. Look carefully, there are many stripes on it. These leaves are so fragile that they break when touched.

Through observation, I found many features of this tree that I can't find without careful observation. In the future, I will observe trees and plants more carefully and enjoy observation.

Since I took a science class this semester, I have especially enjoyed observing ants.

Today I went to the school gate to observe ants. I found some grains of rice on the ground. I saw an ant scout find these grains of rice, and immediately went back to report to its leader. The leader immediately sent hundreds of ants to follow the scout to carry food. To my surprise, these hundreds of ants all follow the path taken by ant scouts to find food. Why? Just when I was puzzled, I suddenly wanted to play a prank. I found a big stone and blocked the ant's way. The ants were in a mess at once. Some people want to climb the stone, some people jump up and down, and some people want to push it away. Later, I moved the big stone and they moved on. When they found the rice, all the ants were exhausted. A minute later, they stood up to carry food.

Let me tell you a secret. I used to watch ants by catching them. Once, I gave it a drop of milk to drink, and it immediately began to drink violently, but its foot slipped and fell into the milk, and it drowned. Another time, I put a grain of rice for it to eat, and it died. I think this method is much better than the original one, and I will never bring ants home again.

Friends, do you know what small animals I like? Ha! Ha! Ha! In fact, I like many small animals, including buffaloes, rabbits and horses ... among them, I like chickens best. Speaking of it, I will first think of an ancient poem I learned in grade one, "You don't have to cut the red crown on your head, but you will walk in the snow-covered future." I dare not speak out of turn in my life, so I asked thousands of families to open it. "

Grandma keeps many chickens, including hens, cocks and chickens. The rooster is the most beautiful. It has small round eyes and a hard golden mouth. It proudly raises its head and shakes its beautiful feathers as if to say, "Look how beautiful I am!" " The rooster's job every day is to stand high. Oh! Oh! "Really woke us up.

Compared with the cock, the hen's appearance is far from perfect. It has a heavy body, short wings and can't fly high. Its main job is to squat in the nest every day to lay eggs. When it lays eggs, it will "giggle" and "giggle", as if to say, "Come and see! What a big egg! " Every month, grandpa will send fresh eggs to my house and say to me, "This is a mountain egg, which is nutritious. Eat more! " ! Study hard. "

This is my favorite little animal-chicken. Do you like it?

In science class, the teacher asked us to observe a big tree and record the observation results. The following is my observation record. The tree I observed is very high, as high as four stories. It grows on the edge of the school playground, and its trunk is so thick that it is almost impossible for two people to hold it with their arms!

The bark is grayish brown and rough to the touch. The trunk is covered with vines, and ants and caterpillars are crawling. The branches and leaves on the tree are lush, the leaves are oval, much like willow leaves, and they smell a faint fragrance. The branches bear brown fruits, like clusters of moths.

The teacher told me that this tree is called Pterocarya stenoptera, which has been growing in school for decades. Teacher's comment: at the beginning, briefly explain the elements of the incident: cause, time, place, operator, etc. The author observed and recorded the height, trunk, bark, rattan, shape of branches and leaves, smell of leaves, fruit, etc. of maple trees in a very detailed and vivid way, and described the image vividly. "The trunk is so thick that it is almost impossible for two people to hold it with their arms." "The branches bear brown fruits, like moths."

Grade four observation composition 300 words 9 ** year165438+1Monday, October 3, the weather was fine.

Today, the teacher asked us to go home and soak soybeans, and then observe the changes of soybeans in the water. As soon as I got home from school, I took out a cup full of water, grabbed a handful of soy milk made by my mother and put it in the cup. Then I waited patiently and imagined what would happen to soybeans.

* *1Thursday, October 4th, sunny 165438.

I ran to see the changes of soybeans as soon as I got up today. Soybean became fat, the skin of soybean began to crack, the water was much less, and the color of water changed.

Go home from school at night, and go home to observe soybeans as soon as school is over. Soybeans have gained a lot of weight, and the skin of beans has begun to fall off, and even clothes can't be put on. But the soybean still didn't germinate, so I changed the water for the soybean.

* *1cloudy on Friday, October 7th, 165438.

Soybeans are growing rapidly these two days. I found a line on the bean, which changed from yellow to green, and finally a small bud grew. Buds are short and thin, sharp and tender, like grass just sticking out. Today, the body of the bud is white, but why are some buds broken? Mom said it was because the container was small. Then, I put them in the basin.

* *1sunny Sunday, October 9 165438.

I got up today and went to see soybeans again. Wow! Guess what they became? Let me tell you something! They became soybean sprouts. Little friends, come and try it!