The essay on the science experiment in the sixth grade should be 500 words, and it is not allowed to

I was nervously doing my homework in the study, and finally I was able to take a break and put down my pen. Hey! Got black on your hands?

Oops, the refill is leaking! Not only my hands, but the cap of the pen was stained with an unsightly layer of black ink, so I quickly got up and went to wash it. I first threw the leaking refill into the trash and went to the bathroom with the cap.

The cleaning began, I put the water on the tap, let the water pour into the pen cap, pour the pen cap upside down and pour water out, um! Not really? Poured a few times, was pulled by whom, no!

Do? If you pull me, I'll dump it! I shook the lid of the pen as hard as I could, and a large pile of black whirring water finally reluctantly went into the washbasin, and sure enough, I did it repeatedly:

Irrigation, throwing water. Soon, the pen cover will be as clean as new from the original black whirring!

Wipe the water off the pen cap, and a big question mark pops up in my mind: for the water in the pen cap, will it not flow? Is it accidental?

I tried it three more times with the cap, and the result was still the same, I took other caps and did it repeatedly, in fact, this is not accidental! Doesn't that make sense? As soon as the water in the teacup is poured, the water in my syringe will flow as soon as it is poured, but not the water in the cap of the pen?

Is it that the thinner the tube, the more difficult the water is? I'd love to give it a try.

I found a few small tubes that sucked milk, pressed one end, and poured water into it, upside down, and the water in it was really. Because the water in a thick pipe is easy to flow backwards, while the water in a thin pipe is? The power to stop the water from flowing down the ** comes from?

I told me what made me wonder, together with the ** reasons.

Yes definitely! He said, "There should be other forces besides." The pressure with the air is the pressure that holds up a part of the water.

It should act on the object, but what about the water in the teacup that will flow as soon as it is poured? I think there is. The friction between the water molecules and the fine substances on the cover wall, the force is like a foot supporting the cover wall, so that the water can not fall.

For the water, the water in the teacup was still poured.

Is this with capillary? "The small substance that there is in the wall of the fountain pen cap will absorb some of the water. I said.

The three of them have their own opinions, and each of them can find a convincing answer for a while.

Why don't you ask Mr. Zhou? ”

Teacher Zhou is a good friend, teaching at the No. 1 Middle School branch, right! The high school science teacher definitely was. I picked up the microphone excitedly.

The surface tension of that water. ”

The tension of the water is! "I hurried to flip through the books.

There is a contraction, tensioning force on the surface of water, and the surface tension of water. "Put a coin in a full cup of water, you can put more than 10 in a row, but the water drum does not overflow." "I heard about this, and I quickly tried it too.

True! "Is it the force that pulls the water at the mouth of the cup? The tension of water!

The water in the pen cap is being pulled? Yes! Definitely.

In the small pen cap, the weight of the water is lighter, the gravitational force of the water molecules and the pen cap molecules in the water droplets is greater than the gravity of the water droplets, the water is not poured, and the water droplets gather, when the gravity is greater than the surface tension, the water droplets will drip. This is the reason why the water in the teacup will pour.

The little bit of water in the cover was firmly inside.

I answered!

Is there a science experiment in 6th grade?

6th Grade Science Essay? Did I hear me right? **How?

Essay on an interesting science experiment for elementary school students in 6th grade 500 words.

There must have been a lot of impressive scientific experiments in your six years of study and life, and in my memory, there was a particularly interesting scientific experiment, that is, "Eruption on Fire".

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 is constantly rising wildly, and after only a dozen seconds, it swarms up from the mouth of the glass, and the mouth of the bottle overflows and flows to 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 scientific experiment allowed me to understand the scientific principles of dispersion and balance while playing, and also exercised my ability to use my hands and brains, which is really the best of both worlds.

Through this interesting experiment, I not only understood the cause of the "volcanic eruption", but also understood that there is science everywhere in the life of the cave, as long as I continue to experience the process of science, I will be able to gain scientific knowledge and understand the true meaning of science.