"Practice using a microscope" Cells are the basic unit of life activities PPT courseware 3

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"Practice using a microscope" Cells are the basic unit of life activities PPT courseware 3

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"Practice using a microscope" Cells are the basic unit of life activities PPT courseware 3

learning target:

1. Explain the structure and function of the microscope.

2. Use a microscope to observe clear images.

3. Recognize the standard operating methods of the microscope and take good care of the microscope.

Self-study guide one

Independently observe page 37 of the textbook to understand the structure of the microscope.

Able to refer to the diagram and name each component.

Self-study guide 2

Read carefully the “Experiments” on pages 37-39.

Important steps are mapped out in the book.

Complete the self-study guide 2.

How to get the mirror and place it?

To take the mirror: hold the mirror arm with your right hand and hold the mirror base with your left hand

Placement: Place it about 7 cm from the edge of the experimental table, slightly to the left. Install the eyepiece and objective lens.

How to deal with light?

1. Rotate the converter so that the low-magnification objective lens faces the light aperture (the front end of the objective lens should be kept 2 cm away from the stage)

2. Aim a larger aperture at the clear aperture. Turn the reflector and see a bright, circular field of view.

How to observe?

1. Place the slide specimen on the stage so that the specimen is facing the light hole, and press the slide specimen with a slide clamp.

2. Turn the coarse focus screw to slowly lower the lens barrel. At this time, your eyes must be looking at the objective lens until the objective lens is close to the slide specimen.

3. Look into the eyepiece with one eye, turn the coarse focusing screw counterclockwise, and slowly raise the lens barrel until you can see the object clearly. Then turn the fine focus screw slightly to make it clearer.

think about it

What phase do we observe through a microscope?

How to calculate the magnification of a microscope?

What changes will we observe after switching from a low-magnification objective lens to a high-magnification objective lens?

summary

The object is an inverted image, upside down and left and right opposite.

Magnification = Magnification of eyepiece × Magnification of objective lens

The greater the magnification of the microscope, the larger the object image observed, but the smaller the field of view.

Optical microscopes can only observe objects that can be penetrated by light

1. The object seen through the eyepiece is _______.

2. The magnification of a microscope is the ______ of the magnification of the microscope's eyepieces and objective lenses.

3. The greater the magnification of the microscope, the more ____ the object image is observed, but the wider the field of view of observation is _____.

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For more information about the PPT courseware "Cells are the basic unit of life activities and practice using a microscope", please click on the Cells are the basic unit of life activities ppt practice using a microscope ppt tag.

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 6:

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 6 1. Understanding microscopes Microscopes are commonly used instruments for exploration, and the main ones commonly used in middle schools are single-cylinder optical microscopes. 2. Use of microscope Watch the video of using the microscope and summarize the...

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 5:

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 5 1. Understanding microscopes Microscopes are commonly used instruments for exploration, and the main ones commonly used in middle schools are single-cylinder optical microscopes. Shutter, the illumination part of the microscope. Function: to adjust the light passing through the light hole.

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 4:

"Practice using a microscope" Cells are the basic units of life activities PPT courseware 4 Self-study guide 1 1. Refer to textbook P37 to name and function each part of the microscope. What is the magnification of a microscope? The magnification of the microscope = the magnification of the objective lens.

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Update Time: 2024-08-01

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