When it comes to essays on science and technology, I recall many small experiments I have done before, and many strange imaginations suddenly appear in my mind. For example, the liquid experiment-the experiment of aloe brewing drugs; Experiment of thermal expansion and cold contraction. In the future world, can we grow a pair of flying wings? Can fish swim in the sky? Can we invent a machine that won't make our hands and feet calluses? ..... Wait a minute. In a word, those fantastic ideas and articles I have made reappear in my mind, especially the water experiment, which makes me remember vividly.

When I got home, I first picked up a transparent glass and then poured some boiling water into it. I turned on the tap gently and let the water drop by drop. I thought to myself: haha! The first step is so smooth that the next steps will be smooth! Then I opened the green oil bottle and let the oil pour into the cup little by little. Then I stirred them up with chopsticks, and the water and oil gradually merged together, but after a while they separated and became two layers: the first layer was green oil, and the second layer was boiled water; I thought about it: hey! How about I get some soy sauce and see what happens? I bought some soy sauce and put it in a cup, and stirred it. The soy sauce and boiled water melted together, but the green oil was still on the first floor. I thought, honey? What if I get some honey? Then, I took out some honey and mixed it with these liquids. Although they began to mix together, they became three layers after a while: the first layer was green oil, the second layer was soy sauce and soy sauce, and the third layer was honey.

I can't help thinking: Why are different liquids mixed together? I want to confuse people. In order to understand this truth, I took it to my father and asked curiously, "Dad, look, no matter how I stir these liquids, I always keep three layers?" Dad looked at these liquids carefully, and then mysteriously said to me, "Dear daughter, do you think there is any difference in the weight of these liquids?"

I held this cup of liquid in front of me, looked at it carefully and thought about it: weight? What is the relationship between liquid and weight? I ran to my father with questions and asked, "Are these liquids light or heavy?" Dad replied affirmatively, "Of course!" Dad's affirmative answer suddenly solved the mystery in my heart: Oh! It turns out that the lightest liquid is always at the top, the heavier liquid is at the middle and the heaviest liquid is at the bottom.

Ah! This magical cup of water makes us understand that oil and water are immiscible, and at the same time, it also makes us understand that experiments will make us grow more knowledge and talents.