Microscopy vertaling bezig

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Microscopie

Program

• Lesson goals
• Explanation:  microscopy + Drawing rules
•  Workshop:               practical   

Learning goal

I n this lesson, you will learn:

 - the parts of the  microscope

    their function

 - prepare a slide and look at it

 - make a biological drawing

Microscope

What can you do with the microscope

De microscope

- To see things, we cannot see with the naked eye.

- Invented by the Dutchman Antoni van Leeuwenhoek

De Microscope

The two main microscopes are:

          1. Electron microscope.

          2. Light microscope.

At school, we work with the light microscope.

De microscope

Learn the parts of the microscope in 3 minutes

Eyepiece lens = the top lens, which is one you look through

Tube = the tube holding the eyepiece lens

revolving nosepiece = you use this to select different obkective lenses

objective lenses = the bottom lenses. magnification 4x, 10x en 40x

Stage = this is where you put the specimen on

Arm = you hold onto the microscope here.

Small knob = this let you adjust the focus precisely

Bulb = provides light

Diaphragm = you use this to adjust the amount of light

Base = the bottom of the microscope

Large knob = you use this to raise or lower the stage quickly to get a sharp view. (only with objective lens 4 x)

what is the name of the lower lens?

1. Eyepiece lens
2. Objective lens
3. Tube
4. Arm

You look through the:

1. eyepiece lens
2. Diaphragm
3. arm
4. large knob

What is the name of the tube you are looking through?

1. eyepiece lens
2. Objective lens
3. tube
4. slide

What do we call the round disk on which the objectives are attached?

1. Tube
2. Objective lens
3. Revolving nosepiece
4. Diaphragm

By what do we grab the microscope?

1. base
2. arm
3. stage
4. Objective lenses

What is the function of the diaphragm?

1. enlarge the specimen
2. controlling the amount of light
3. to pick up the microscope
4. turning the microscope on/off

base

large knob

diaphragm

stage

objective lens

tube

I understood this part .....

😒🙁😐🙂😃

The drawing rules (repetition)

Drawing rules

- What do you draw?

- Where will be the text?

-  Drawing rules

- How should we apply the drawing          rules?

Which drawing rule line is incorrect?

1. Draw and write with a pencil
2. Name the parts of your drawing
3. Color your drawing
4. Write a title at the top of your drawing

A drawing rule is that you always draw with pen

1. true
2. not true

If you did not understand the drawing rules, you can watch a video with the instruction on the next slide!

,  

I understood this part ...

😒🙁😐🙂😃

Microscopy

Materials and the slide

• slide
• coverslip
• object (the object you are going to look at)
• water

The specimen consists of:

How to make a specimen 

You make the specimen on your own table/desk.

-     1 drop of water on the object glass

-    Use 1 leaf or a piece of a leaf of waterweed

-    Put the leaf in the drop (not double!)

-    Put the cover slip on (make sure there are no air bubbles)

-   Remove any excess moisture (dab with a cloth)

Leg het preparaat tussen de preparaatklemmen op de tafel van de microscoop. 

Schuif het naar achter.

Je legt het preparaat NIET onder de klemmen!

Je maakt eerst je preparaat. Als het klaar is, leg je het op de tafel van de microscoop.

Zorg dat je preparaat recht boven 

de opening in de tafel komt te liggen, verplaats de kruistafel

Het licht schijnt door je preparaat.

40-100-400 x vergroten

Dit wil je graag zien als je 400 x hebt vergroot.

Je kiest bij 40 x al een duidelijke mooie cel met nogal wat bladgroenkorrels.

Je weet dat je bij 400 x op verschillende lagen kunt scherpstellen.

Kies de laag die duidelijk is, DAN kun je gaan tekenen

Workshopsessie

Practicum opdracht

vragen?

Lesdoelen behaald?