2024年3月12日发(作者：dnf手游正式上线时间终于公布了)

篇一：

An interesting experiment composition

I'm a little science fan. Today, my mother and I did an interesting experiment at

home - solar fan.

The experimental materials are motor shell, solar panel, maple leaf, column, etc.

First, my mother asked me to install the motor into the motor housing, then connect

the motor wire to the fan rod, then connect the solar panel, and finally, install the

base connection switch. Insert the fan blade, and a big solar fan is born. I pressed the

switch excitedly, expecting the fan to turn. However, the fan stood still and slept

there. I wondered which step I had made a mistake. My mother saw my anger and

said, "Try it in the sun?" I did as my mother said, and the fan really turned.

Eh, why do fans turn up in the sun? A big question mark popped up in my head.

After listening to my mother's explanation, it was the principle that solar energy was

converted into electricity. Oh, I suddenly realized.

What a happy day! I have acquired new knowledge.

篇二：

An interesting experiment composition

This morning, the teacher and we did an interesting experiment in composition

class - floating villains.

The materials to be prepared for the experiment are: a dry plate, a water-based

marker, and half a glass of water.

First, I took out a dry plate and a water-based marker and put them on the table.

Then, I took the pen and drew a small matchmaker on the dry plate. Draw the

matchmaker several more times to make it thicker. Then, when the ink is dry, pour

water in. You must wait until the ink is dry. How can you tell the ink is dry? You can

take the dish askew and have a look. If there is no ink, you can do it. Then, slowly

pour the half cup of water from the edge of the dish into the middle of the dish.

Remember not to pour it all at once, but also pay attention not to pour too much,

just pour a little, and cover the bottom of it completely. Finally, gently shake the plate,

and the little matchmaker moved, as if he were swimming in the water.

Why is this? I was puzzled. The teacher uncovered the mystery for us. It turns

out that the water-based marker contains a substance called stripping agent, which is

easy to be washed away or wiped off by water. The pattern drawn by the water mark

is easy to leave the plate and float on the water.

Today's experiment is really interesting. It turns out that we still have so much

scientific knowledge in our lives.

篇三：

An interesting experiment composition

Today, the teacher sent a video of a scientific experiment in the class - a floating

villain. After I read it, I found it very interesting and couldn't wait to try it.

I asked my mother to help me find the materials needed for the experiment: a

plate, half a glass of water, and a water marker.

The experiment began. First of all, I wiped the dishes with a paper towel and let

the natural wind dry them. Then, I picked up the water marker and drew a cute

figure on the plate, and I had to draw it twice more. Only in this way can the villain

paint more solidly. Then, let the wind slowly blow dry, and then slowly, little by little,

pour water from the edge of the plate to the inside. Finally, I shook the plate carefully.

After a while, the little man floated up and floated in the water as if he were

swimming? I laughed happily.

What the hell is going on? I checked on the Internet and finally found the

answer. The original water-based marker contains a substance called stripper, which

is washed away or wiped off by water. The villain with water mark strokes on the

plate can easily get away from the plate and float in the water.

This experiment is amazing! I have gained new knowledge today.