"How to Make It Bigger" Tiny World PPT Courseware 3

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"How to Make It Bigger" Tiny World PPT Courseware 3

Make a simple microscope

1. Use two hands, one behind the other, or one up and down, to adjust the distance between them to observe the object until you can see it most clearly. Then remove one lens and observe the object using only one lens. Repeat it several times and see what you find?

2. Move up and down to adjust the distance between the two convex lenses until you find the clearest image of the object. Use a plastic tube to fix the two lenses, and a simple microscope is ready. Try it and see if the image of the object is enlarged.

observe objects around you

Use a homemade microscope to observe surrounding objects. Compared with a magnifying glass, does the magnification of the image of the object increase?

Have we discovered something new? Write down our findings.

Class summary

1. Use two magnifying glasses to make a simple microscope. Two convex lenses combine to make the image of an object appear larger.

2. The invention of the microscope has broadened the field of observation. The microscope is an important observation tool for humans to understand the tiny world.

Classroom testing

1. Fill in the blanks

1. The world's first microscope was invented by the Netherlands ( ). Now people have invented ( ) microscope and ( ) microscope.

2. Microorganisms were discovered by ( ).

3. An electron microscope can magnify objects up to ( ) ten thousand times.

4. The ( ) microscope is more advanced than the electron microscope, with a magnification of ( ) times.

2. Judgment

1. The combination of two convex lenses can increase the magnification of an object ( ).

2. There are many microorganisms invisible to the naked eye in rainwater and river water. ( )

3. The magnification of a convex lens is limited. ( )

4. Thanks to the invention of the microscope, people can observe a richer microscopic world than what can be achieved through magnifying glass observation. ( )

5. Levine Hooke made the world's first metal structure microscope that can magnify nearly 300 times. ( )

6. Microscopes, like measuring cylinders and spring balances, are tools for humans to understand the surrounding materials ( )

7. The magnification of a microscope is infinite. ( )

8. Adjust the distance between the two convex lenses of the microscope to obtain a clearer image ( )

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Update Time: 2024-11-23

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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