How do eggs float essay on fourth grade elementary school

Do you believe that eggs can float on water? If not, I'll let you see is believing—look at this experiment that our composition class did.

The teacher first took out a transparent tall glass, then took out a stainless steel spoon, and knocked on the tall glass, making a crisp and loud sound. Then he poured about half a glass of water into the glass and took out an egg as if by magic. The teacher asked mysteriously

What happens if you put this egg directly in the water? "The classmates gossiped, some said that they were sinking, and some were saying that they were floating. The teacher gently put the egg into the water, and the egg sank.

Wang Huiyan scooped a spoonful of salt into the water, and the egg moved for a moment, then sank again. Wang Huiyan put in a large spoonful of salt, and then stirred it with a spoon. My eyes widened as I saw the egg slowly floating.

Finally, the teacher simply poured in some more salt, and the egg shell finally came out of the water. The teacher pressed the eggshell down, and as soon as he let go of his hand, it bounced up like a spring again.

The teacher asked us to tell the reason, and we were all two monks who were confused. The teacher said: "In fact, the scientific truth of this experiment is that because the density of salt water is high, the buoyancy generated is large, so the eggs can float in the salt water. "We realized.

There are endless mysteries in the kingdom of science, and a small experiment can contain great truths. As long as you use your brain, you will reap the rewards!

One day, we were looking at the science books as we normally would, waiting for the teacher to come and give us a science lesson. After a while, the teacher came in, cleared her throat and said to us, "Students, let's do an experiment today.

Immediately, the students cheered because this was our first time doing the experiment.

We quietly followed the teacher to the science lab, and it was very large, the size of two classrooms. I saw that the experimental equipment was already waiting for us on the table. The teacher showed us first, and she skillfully picked it up.

I saw that the students were watching intently, staring at every action made by the teacher. After doing this, the teacher said, "When you turn on the alcohol lamp, you must be careful, otherwise it will happen."

When the students heard this, they were all panicked. "Next, please do it once in a group. The teacher said.

Everyone in our group was scared, afraid that the alcohol lamp would blow them up, and they didn't dare to take the lead. At this point, we had to guess and decide. "Rock-paper-scissors.

Haha, Huang Yuheng lost. He said, "You didn't just say that you should lose first.

He's so sloppy? When I usually see him so strong, I think he is very bold! Unexpected, so timid.

So, we had to do "rock-paper-scissors" all over again. "Ah--- I can't help but scream, I lost. I'm going to start doing it. I thought to myself: I can't be religent, I'm the squad leader, I can't do this, I must succeed.

The materials in front of me are: iron stand, alcohol lamp, test tube clamp, glass, glass piece, match. I brought the iron stand in front of me.

Pour about 500 ml of water into a glass, place a mesh on the iron stand, and place the glass on top of the mesh. Then use a test tube clamp to clamp the glass piece. At this point, it's time to light the alcohol lamp.

What to do? What to do? My heart is like fifteen buckets of water--- seven up and eight down.

But I can't back down! That's what my heart thinks. I finally decided to insist, I carefully and meticulously swiped the match, at this time, I saw that the people in our group were far away from me, and I knew that they were afraid that they would **.

Please, don't be so cowardly," I shouted to them. Even though I said that, I was actually scared too. I slowly lit the alcohol lamp from the bottom up.

I carefully placed it underneath the wire mesh. On top of which I put a slice of glass on top of the glass. At this point, we wait for the rain to form.

After 3 minutes, I saw that the other people who were slower than us just now had raindrops. But why hasn't our group yet. To be on the safe side, we consulted with our teachers.

The teacher said, "Of course you can't pull so much water. In this way, we were scolded by the teacher.

Then, we learned the lesson of our last failure, and this time, we just put 200 ml of water. "Success, success" The people in our group cheered, happy for my success, and at this moment, my heart was also sweet.

This experiment taught me that science is magical, and as long as we dare to experiment boldly and think boldly, then we will succeed.

The egg floats up essay how to write an introduction as follows:

The Egg Floats Essay 1

When I heard that adding salt to water would make eggs float, I went into the kitchen to witness the amazing experiment.

I took the eggs out of the kitchen and prepared a glass, a jar of salt, and a pair of chopsticks. I took a glass of clear water and carefully put the eggs into the bottom of the glass, for fear that the eggs would break. Then I added a few spoonfuls of salt to the cup, but the egg didn't move at all, and I fell asleep at the bottom of the cup, which made me a little disappointed.

I added a few more spoonfuls of salt to it, but it still didn't move, as if it didn't care what I added, and still fell asleep at the bottom of the glass. Finally, I stirred it with chopsticks, and the egg finally woke up. It floats up and sinks for a while, and my mood is also happy for a while and lost for a while.

Eventually, it sank. Just as I was distressed, a miracle happened, and the egg floated to the surface.

At this point, a big question mark appeared in my head: salt is much lighter than an egg, why does salt make an egg float? After listening to my mother's explanation, I learned:

Salt and water together are salt water, and the density of salt water is greater than that of eggs, so salt can make eggs float in the water.

The Egg Floats Essay 2

I went to the kitchen and poured some warm water into the bottle. Then I'm going to put the eggs in it, and if this step is wrong, the previous work will be in vain. Just tilt the bottle a little bit and put the eggs in again.

But the egg moved, and the companion did not move, so chaotic, and the wild seemed to be asleep. Then I picked up the spoon and added a spoonful of salt. Then he picked up the chopsticks and began to stir them, and the egg stretched his waist, but he didn't want to come up.

I had to add more salt and continue to stir, and the egg wobbled but did not float. I didn't give up, I added salt like crazy, I stirred like crazy. A miracle happened, and the egg floated.

I pressed it down with my hand, and it actually floated up again.

I was curious about how it works, so I looked it up on the Internet. It said, "It turns out that buoyancy is at work." The egg is denser than water and sinks into the water. When salt is added to the water, the density of the aqueous solution increases, and the buoyancy increases, and the egg is dragged up.

The Egg Floats Up

This afternoon, Mr. Fang asked us to go back to do the experiment. Put the eggs in a glass filled with water, and stir the salt in the water several times until the eggs float. When I got home from school, I couldn't believe it, so I took an egg out of the fridge and put it in a cup filled with water, and the egg sank to the bottom.

Then I put some salt and after stirring well, there was no change.

When I put it in the third scoop, the egg slowly left the bottom of the cup, and I excitedly shouted, "Daddy, the egg is out of the bottom of the cup." "I added some more salt, stirred well, and some of the eggs came to the surface.

I called my dad and asked, "Why is that?" "Dad explained to me:

Eggs are more buoyant in salt water than in fresh water, and the greater the concentration of salt water, the greater the buoyancy. So when you keep adding salt to the cup to melt, the egg will slowly float and the part that will come out of the water will become more and more. But when the concentration of salt reaches saturation, the buoyancy no longer changes, and the float and sink of the egg no longer changes.

After listening to my father's words, I still didn't know much about it, but I was glad that my experiment was successful.