Magical natural composition in the third grade of primary school

# 3 # Introduction Learning to write a composition is the improvement of his self-expression ability. Learning a good composition can make him more interested in future study and express his views, opinions and mature ideas more skillfully and fluently. The following is the magical natural composition of the third grade of primary school, I hope it will help you.

One night in summer, the weather was very sultry, and it soon began to rain cats and dogs. There was a sudden loud noise in my ear, which made me shudder. A dazzling flash outside the window slammed to the ground with a loud noise. I looked out of the window in surprise. My father went to the window and asked me, "Do you know what this is?" I shook my head.

"This is lightning." Dad said, "Lightning is a discharge phenomenon in nature. When it is hot and humid in summer, due to the sun's irradiation, the air temperature near the ground will increase and the density will decrease, resulting in an upward movement. In the process of ascending motion, the water vapor in the air will continue to cool to form small water droplets, and the small water droplets will continue to gather to form clouds. There will be many such clouds moving in the sky, colliding with each other and rubbing against each other, thus generating a lot of positive and negative charges. Positive and negative charges gather at both ends of the cloud to form an electric field. When these positive and negative charges gather to a certain extent, there will be a very violent discharge phenomenon. In the process of discharge, a strong current will be generated to break through the air, forming a discharge channel, and at the same time, a strong flash will be emitted. This is lightning, and it will vibrate and make a loud noise. This is thunder. "

I finally understand the reason for this rumble and flash.

It is still raining outside the window. From time to time, thunder roared, lightning flashed and thundered. Nature is really amazing.

extreme

It's sunny today, and there are no clouds in Wan Li. After learning the violin, I waited for my mother at the door of the classroom. The sun is burning on me, and I'm sweating like I just came out of the bathroom. In a blink of an eye, the sky was suddenly overcast and sultry, and Grandpa Sun was like a shy little girl, quietly hiding in the clouds. At this time, I happened to find a group of small ants on a tree in front of the classroom. Like soldiers, they climbed the tree bravely and uniformly. Holding food one by one, they moved to the gap in the old tree. The ant that put the food in the crack of the tree turned back and moved on. Ah! Aren't these ants moving? Suddenly I remembered a proverb: "It rains when ants move."

I quickly called my mother: "mom, don't forget to bring an umbrella when you come." The odds are that it will rain。 My mother didn't seem to believe it and said, "It doesn't seem to rain today. But for insurance. Take it! Before long, the dark clouds in the western sky drifted here slowly, and soon filled the whole sky, rumbling and deafening. Suddenly, the bean-sized raindrops fell! Mother said with a lingering fear, "Thanks to you!" Otherwise, the two of us will become "bubbles".

Nature is amazing! Only by careful observation can we discover the mystery contained in it!

Tisso

One day, it was sunny and I went out to play by bike. I came to the park and suddenly something flew into the sky. It was a flying saucer. Suddenly I saw white clouds and blue sky. White clouds are like snow, like all kinds of animals and plants. Look! That white cloud is more like my favorite animal-eagle, spreading its big wings and flying freely in the blue sky. How mighty and powerful the eagle is, it is the sky. Look at that bird without wings. Next to the bird is not the dragon in the fairy tale, but also the princess. Clouds are like a magician. They can make many things. I like clouds, and suddenly it's dark. It turns out that clouds cover the sun, and I don't care

I also saw ants climbing high, so I stopped to observe and found that ants were in a hurry. Look! This ant is really a Hercules, and the worm is two or three times bigger than it.

At this time, the weather became darker and the wind became stronger. I hurried home, and when I got home, I asked my mother, what happened when the ants climbed high? Mother said, "It's going to rain soon." I watched TV with a grain of salt. After a while, it really rained heavily!

Nature is amazing!