This afternoon, it was sunny, and I was doing my homework alone on the balcony at home. Suddenly, the door was opened with a bang. It turned out that dad bought a bag of rice and was panting when he carried it to the fourth floor. After entering the door, he quickly put the rice bag on the small square table in the kitchen. But when he suddenly bent down again, he seemed to find something. I know my father is a science fan. I think he must be fascinated by a scientific phenomenon and is studying it carefully.

Sure enough, after a while, my father called me excitedly: "Min Min, come quickly! I'll show you an interesting phenomenon. " I walked over reluctantly and thought, really, I have homework to write! I saw my father pointing to the rice bag on the table and said to me, "Look, there is no rice in the corner of the rice bag above, but why are there many big grains of rice stuck on the asbestos bag in the corner of the rice bag?" I said disapprovingly, "That's because rice is sticky." "The rice is sticky, but it must be wet. Besides, this rice is made of dry rice, so it can't be so sticky. If it's so wet, why aren't the clothes carrying rice on my shoulders wet? " I was puzzled by my father's words, so I had to be speechless, but I was unwilling. I still asked, "Why?" I saw my father smile mysteriously, put up a finger and slowly approached the corner of the bag with rice grains. Before my father's fingers touched the bag, the rice grains stuck on the corner of the bag quickly escaped from the bag and fell into the rice pile at the bottom, just like magic. At this time, I was shocked.

To find out, I begged my father to show it to me again. Dad smiled and agreed. He rubbed one hand on the outside of a corner of the rice bag for two or three minutes, and then quickly picked up the corner. I am puzzled by the present situation-many grains of rice seem to be firmly absorbed by rice bags. When dad's fingers approached the rice bag, but they didn't touch it, the rice stuck in the rice bag escaped from the rice bag like a demon. Where did dad's finger move? I quickly asked, "Dad, why is this?" Did something happen after your friction? "Dad smiled and said," This is static electricity. " "Static electricity!" I opened my eyes curiously. Then my father beautifully introduced me to the knowledge about static electricity, which opened my eyes. It turns out that as long as there is friction between objects, electricity will be generated, and the electricity residing on the surface of objects is called "static electricity". Static electricity can be divided into positive and negative charges. When the same kind of charges are close to each other, they will generate repulsion, and when the different kinds of charges are close to each other, they will generate attraction. The human body sometimes has a certain amount of static electricity. When dad carried the rice from the downstairs to the fourth floor, the rice in the bag kept rubbing against the bag, and the rice and the rice bag produced different static electricity, so the rice was firmly absorbed on the bag. When the static electricity brought by human body and the static electricity brought by rice belong to the same charge, repulsion will occur. After knowing the truth, we had a good time rubbing our hands on the rice bag in turn to compete for the ability to "drive away" the big rice grains on the rice bag. Very interesting. I opened my eyes wide and couldn't believe all this was true.

I am very happy today. Really let me feel the wonder of science!