当前位置:首页 > 小学英语 > 文章内容页

小实验作文 小学三年级500字

Small experimental composition, the third grade of primary school, 500 words

来源: 作者-岩呵呵time 日期:2019-09-09 11:53:45 分类:小学英语 阅读:

铜丝怎么样就会发热呢?想知道就跟我去我的学校这实验室看壹个究竟吧!

实验前,老师拿出了五根二十公分的铜丝,并让我们摸了壹摸。过了壹会,老师说:“铜丝热不热。”同学们说:“不热,很凉。”然后,老师把同学分成五个小组,也选出五个小组长;跟着又把五根铜丝交给五个组长,由他们分给每个同学。之后,老师说:“同学们,你们知道我为什么要把铜丝给你们吗?”同学们说:“不知道。”老师说:“我是想让你们做个实验。”

第壹个实验开始了,老师说:“用手握紧铜丝,迅速地来回弯折多次。”我照老师说的去做,我弯折五次,我发现铜丝中间出现了壹条细细的裂缝;我再弯折壹次铜丝,铜丝就断了。我高兴地对老师说:“铜丝断了。”

How will the copper wire heat up? If you want to know, just go to my school in my school and see what it is!

Before the experiment, the teacher took out five twenty centimeters of copper wire and let us touch it. After a while, the teacher said: "The copper wire is not hot." The students said: "Not hot, very cold." Then, the teacher divided the classmates into five groups and also selected five group leaders; The root copper wire was handed over to the five team leaders, who gave them to each classmate. After that, the teacher said: "Classmates, do you know why I want to give you the copper wire?" The students said: "I don't know." The teacher said: "I want you to do an experiment."

[123 The first experiment started. The teacher said, "Catch the copper wire with your hand and quickly bend it back and forth many times." I did as the teacher said. I bent five times. I found a piece in the middle of the copper wire. Thin cracks; I bend the copper wire again and the copper wire is broken. I am happy to say to the teacher: "The copper wire is broken."

The second experiment began. The teacher said: "The left hand grips the copper wire, and the right hand holds the copper wire and pulls it back and forth many times." I also did it according to the teacher. After a while, I felt that the copper wire was very hot and the copper wire was hot.

After the experiment, the teacher explained: "The friction produces mechanical energy, and the mechanical energy is changed into heat energy, so the copper wire will be hot."

After the experiment, I thought: Science is really interesting, I grew up too. Be a scientist. I want to study the mysteries of energy, find a kind of energy that is not polluted, let the car run without black smoke, make the earth more and more clean, and human beings live in a beautiful environment.

X

打赏支付方式: