I did a little experiment essay of 500 words

I did a little experiment.

When I was studying, I saw that triboelectric is magical, it can suck up small things. Is it really that magical? I wanted to do an experiment and give it a try.

I couldn't wait to prepare the materials for the experiment: a plastic pen and some scraps of paper. The experiment began, I picked up the barrel of the pen and rubbed it quickly on my hair, and when the friction made my scalp hot, I quickly picked up the barrel of the pen and slowly approached the confetti, I thought, will a miracle happen?

I held my breath and widened my eyes, waiting for a miracle to come, and when the barrel of the pen was a centimeter or two closer to the piece of paper, the miracle really happened. The shredded paper "flew" up as if it had grown wings, and stuck to the barrel of the pen. Yes!

It's amazing! Why is this happening? I put a question mark on "Du Niang". Triboelectric is the result of the transfer of electrons from one object to another, causing both objects to carry an equal amount of charge.

The object that gains electrons is negatively charged, and the object that loses electrons is positively charged. Therefore, when two uncharged objects are electrified, the amount of electricity they carry must be equal numerically. Objects that have been rubbed have the phenomenon of attracting small and light objects.

Today, I was reading a book with relish, when suddenly an article caught my eye, the book said that tea can be "transformed" into ink. I was skeptical, so I decided to do this experiment myself. I found a bowl, a handful of tea leaves, and a cup of hot water.

There are also indispensable rusty iron nails.

The experiment began, first I put the tea in a bowl and brewed it, and after a while the color of the tea became darker and darker, and when it was about to turn earthy yellow, I carefully put the rust nails into the water one by one. When I was done, I waited anxiously for the results of the experiment. In the afternoon, when I looked, "Wow," I couldn't help but exclaim, it was incredible, the tea in the bowl turned into ink, I used a few drops of my pen to write on the book, and a black word suddenly came into my eyes.

Wow, the same as ink.

I wondered, why does the rusty iron nail change so much when it is put into the tea? After checking the information, I found out that because the tea contains a substance called tannin, it will cause chemical reactions when it encounters rusty iron, so the tea becomes black water.

Science experiments are not only interesting, but also wonderful, we should love science from a young age and become a scientist when we grow up.

Poly training essay.

After dinner, my dad and I were running on the playground, and we felt very thirsty as we ran, so we drank all the two bottles of mineral water we had brought. Just as I was about to throw the bottle in the trash, I suddenly remembered an experiment I had seen on TV about a bottle race. Because I was in a hurry to go out last time, I didn't see the results of the experiment.

Tonight I decided to try it myself.

When I got home, I was carrying two identical empty bottles, one for water and one for sand. I remember a big brother on TV saying that two bottles must be equal in weight. So I found a small electronic scale that my mother put in the kitchen, put the two bottles on the scale and weighed them, and found that the bottle containing water was heavier, so I unscrewed the cap and poured out a little water, and then weighed it again, and found that there was still a lot of water, and I poured the water twice before the weight was finally the same.

I ran downstairs with two bottles and a baffle and found a place with a ramp. First use the baffle to block the top of the ramp, then put the two bottles horizontally behind the baffle, and then count silently!

Finally, when I lifted the baffle up, I saw that the bottle filled with water immediately ran up, running faster and faster. And the bottle of sand hesitated for a moment, and then began to run, and there was no suspense, and the bottle of water won.

Are you as curious as I am about why the bottle of water wins? I later asked the computer teacher and found out that sand has friction, but water is really smooth and doesn't create friction, so the bottle of water wins.

It's so much fun to experiment!

Is this okay?

Today Dad and I played an interesting experiment, we took a basin of water, and then put a toothpick carefully on the water, and then put a small sugar cube in the water, I saw the toothpick float in the direction of the sugar cube, and then we changed sides, yes, or his toothpick carefully placed on the water, and then put a small piece of soap in the water, I saw the sheep cut floated away and left the fat I think it's so strange, is the toothpick and I like to eat sugar like me, don't like soap?