65438+In 1970s, Levin Hook, a janitor in Delve, the Netherlands, accidentally put two magnifying glasses together and made a simple microscope, from which not only objects magnified dozens of times can be seen, but also some living things can be seen. Since then, human beings have opened the door to the microbial world.

In this unit, we learned the mystery of the tiny world and how to use the microscope, but what impressed me most was observing the microorganisms in the water under the microscope. In that class, after we took the microscope, we couldn't wait to start observing. I thought it was just magnifying the water. Unexpectedly, there are piles of sludge and small plants in the water, and even a piece of mud and a beard can be seen clearly. However, I just can't find anything that moves. Suddenly, something like dirt and small particles came into view. It moves slowly, its body contracts and opens, with a red and black dot in the middle. I guess that's the nucleus. Besides these, some of them have a small tail and many light spots. The book says flagella and food vacuoles. I was very surprised. Microorganisms are large and small, some are rod-shaped, some are changeable, and some are round. Everyone was surprised. So the microbial world is so interesting!

After this lesson, I am more curious about this small world. I believe we can see more. When we grow up, we can come into contact with more microorganisms. I also believe that when we grow up, human beings will develop better tools and observe a smaller microbial world. ...