I did an experiment with so and so essay in the fifth and sixth grades, and wrote two essays

Yes! I discovered a secret! "You must be wondering what secret I've discovered, right?

Don't worry, let me tell you slowly. After eating that night, I washed my hands in the bathroom. Suddenly, I glanced at the mop in the corner.

I was amazed at what I saw—there was a small round ball at the junction of the mop's stick and the strip of cloth. I quickly dried my hands, crouched down next to the mop to observe carefully, and gently flicked the ball with my hand. Ah, there's a thin stalk underneath that little ball.

I took a closer look and said, "Ah! I couldn't help but scream. The so-called "little ball" is a small mushroom, and a small mushroom grows on the mop!

I couldn't believe my eyes, and looked at it carefully. It was indeed a small mushroom, a cut shorter than my little finger. It may be because the thin stems can't withstand the pressure of the mushroom head and have been bent and covered.

If you don't use your hand, it's hard to spot that it's a mushroom. It's like a fluffy little ball lying on a mop, so cute! After confirming it, I hurriedly ran out and spread the word to the whole family:

Big news, big news, mushrooms grow on the mop at home! As soon as I finished speaking, my parents looked at me strangely. I recounted to them what I had just seen, and dragged them to the bathroom to see the "magical" mop with mushrooms on it.

Mom and Dad read it and just discussed a few words. Mom said, "Oh, it's nothing, it's been growing several times, you just don't know."

Suddenly, my father asked me, "Tingting, do you know why mushrooms grow on the mop?" "Well, that's going to stop me.

I'll immediately search east and west. I finally found it in "100,000 Whys", and said: "Maybe it's because mushrooms are made of a microorganism, and this microorganism grows into a mushroom under the right conditions."

As for the mop, it is often damp and placed in a dark corner, and the bottom of the stick will be a little rotten, which meets the growth conditions of microorganisms, so the junction of the stick and the cloth strip will grow mushrooms! It's the same reason that mushrooms grow in the grass after rain. With that, I let out a long breath and looked at my dad expectantly.

Asked, "Am I right?" Dad nodded approvingly at me and said

Yes! "I've also gained a lot of knowledge. I'm so happy because I discovered the secret of the mushroom growing on the mop and learned the truth.

In fact, science is all around you and me, as long as you observe carefully and think positively, you will definitely find many interesting things and taste the joy and joy of discovery!

Volcanic eruptions", you must have seen it on TV, but have you ever seen it with your own eyes? I've seen a "volcanic eruption" once, but this is a "volcanic eruption" simulation experiment, and I did this experiment myself. Hey, "volcanic eruptions" are fun.

I was asked to bring a glass, a bottle of vinegar and a bottle of detergent, a packet of baking soda, and a newspaper. Start by pouring some baking soda into the cup, then pour in some detergent, and then put the newspaper under the glass. The experiment was about to begin, I poured some vinegar into the cup, and the miracle soon happened, just now the bottle was just some baking soda and detergent, how could it be that it only took a few seconds to turn into foam?

And it was just a little bit of foam, but now it continues to rise wildly, and after only a dozen seconds, it swarms up from the mouth of the glass, overflowing the mouth of the bottle and flowing onto the newspaper. At this point, I was excited and surprised, staring intently at the bubbles that floated up, for fear of missing any details. After about 18 minutes, the bubble gradually disappeared again.

Ha, this experiment is so fun and so interesting! Why is that? I hurriedly grabbed the book and checked it, but there was not a word on the book, alas!

I had no choice but to figure it out on my own. Didn't Mr. Liu say in class: baking soda and vinegar will have a chemical reaction to produce a lot of foam, just like soda, shaking it will also produce some foam.

So what does detergent do? I couldn't figure it out even if I racked my brain. In order to understand the mystery, I redid this experiment again and found that the reason why foam is crazy is because detergent plays a catalytic role.

Isn't this similar to the principle of formation of pumice? This little experiment is really interesting. Doing a small science experiment allowed me to understand the scientific principles while playing, and also exercised my ability to use my hands and brains, which is really the best of both worlds.

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?

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.