Learning to Use the Microscope Kennewik School District学习使用显微镜，肯纳威克校区.pptVIP

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Learning to Use the Microscope Kennewik School District学习使用显微镜，肯纳威克校区.ppt

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Learning to Use the Microscope Kennewik School District学习使用显微镜，肯纳威克校区

Objectives Learning to Use the Microscope Microworlds Lesson 5 Background continued…. Questions…. REVIEW Materials Student Microscope Viewing the microfiche Recording your observations Prepare for Lesson 6 Bring in some printed materials to look at in Lesson 6. Good items to bring would be newspapers, magazines, and comics. Also, catalogues, advertising fliers, cereal boxes, postcards, and stamps. * * Microworlds Lesson Five: Learning to Use the Microscope Student acquire background information about the microscope. Students learn the functions of the parts of a microscope. Students learn how to adjust the light and how to focus the microscope. Students develop the concept of a field of view. The first person to make and use a lot of microscopes was a Dutchman named Anton Leeuwenhoek. Leeuwenhoek lived in the 1600s in the Netherlands, and he owned a store full of cloth and pincushions for sale. But the store was never open because he preferred to spend his time trying to create pieces of glass that would help him see small things. * Background microscope microscopic After grinding many pieces of glass, trying to create lenses, Leeuwenhoek succeeded in making a microscope which looked somewhat like this: * Leeuwenhoeks microscope consisted simply of: a screw for adjusting the height of the object being examined B) a metal plate serving as the body C) a skewer to impale the object and rotate it D) the lens itself, which was spherical * /molerat/micro.htm Most of Leeuwenhoek’s microscopes were tiny things, not much larger than 1” x 2”. And he had lenses to match-small, polished rock crystal, even a polished grain of sand. At this time new things were happening all over the world. Leeuwenhoek was fascinated with what he could see with his microscope. He was the first person ever to see one-celled plants and animals. * ciliate microbe One of the first times he ever saw bacteria was when he scraped some of the plaque from his teeth and looked at i