One morning in the summer vacation, I found a spider web in my grandmother's yard. A fly flew over and stuck to it. Flies keep struggling and nets keep moving. The spider came out at once and the fly became its food. A gust of wind blew and the spider web shook again. I thought I would come out, but I didn't come out after waiting for a long time. Why does the bug come out when it hits the net, but the wind blows it away? In order to find out this topic, I did an experiment.

I used a fan to fan the cobwebs from fast to slow, and finally the fan "flew" and no spiders came. This trick didn't work, so I changed it. I gently stirred the spider web with wicker, but the spider still didn't come out. This trick didn't work, so I changed it. I kept throwing stones in the direction of the spider web, but who thought, the spider still refused to come out.

This trick doesn't work. I changed my game. I broke the spider's web and wanted the spider to come out and weave. Who can't think of it? I had no choice but to catch a dead fly and put it on a spider web, but there was no sign of the spider. Why does a live fly come out to hunt only when it sticks to the net? My suspicion is getting stronger and stronger. It seems that I have to invite someone else.

I went to ask my mother, and my mother said, "I don't know. Ask your sister about this scientific knowledge." I went to ask my sister again. My sister said, "What kind of questions should you ask your father?" I had no choice but to ask my father, who said, "The frequency of live insects is different from that of wind. The vibration frequency caused by insects is hundreds of thousands to tens of thousands of hertz, while the vibration frequency caused by wind is only a few tenths of hertz.

Oh! I see. Today I learned another thing, a new knowledge, and my heart was full of sweetness.