Microscope

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Why do we need a microscope?

Why do we need a microscope?

Leaf tissue

stomata (=...... )

Learning how to do Research
Microscope.  (p. 137-143)

 Read 'Parts of the Microscope' and 'Preparation'

- Make 1 t/m 3 (p. 139-140)

- Try to memorize the parts of the microscope

(     )

(              ) 

=large knob

=small knob

microscope steps       

1. put slide under microscope
2. turn the smallest objective (4x)
3. put on the light
4. use large knob to focus
5. turn larger objective (10x)
6. use small knob to focus!!
7. turn objective to 40x
8. use small knob to focus!!

Always be careful with the microscope

- lift on the arm, one hand underneath the base

Cleaning up:

- Turn nosepeice away

- lower the stage

Beginner mistakes

- lowering the platform before switching the objective lens --> not necessary

- sit in front of the microscope --> handier to sit behind it (arm towards yourself) 

- not reading the practical 

- turning on focus knobs while you're not looking trough the microscope --> Why? 

If you don’t see an image, that might be for one of the following reasons:

1 You have not turned the revolving nosepiece properly and the objective lens is not precisely above the specimen. In most

microscopes, the revolving nosepiece clicks into place.

2 The specimen is not placed properly above the opening in the stage.

3 You are using too high a magnification.

4 The diaphragm is not letting any light through.

5 The bulb is not switched on.

Check the above before you ask for help.

Have you memorized the parts of the microscope?

Stuur foto in van de tekening van je foto krantenletter door microscoop

Which part do you look through?

1. Ocular lens
2. Base
3. Body tube
4. Light source

What is the magnification when the ocular lens magnifieks 10x and the objective 40x?

1. 50x
2. 400x
3. 40x
4. 500x

Which knob do you first turn to focus?

1. The small knob
2. The light source
3. The diaphragm
4. The large knob

Learning how to do Research
Microscope.  (p. 137-143)

Practicum 1 op pagina 145

- Haal een microscoop en preparaat, stel scherp op 40x 

- Maak een foto door de oculair, laat deze aan de docent zien

- maak de tekening op p. 145

- Maak practicum 3 af op pagina 146 (tekening van krantenletter) denk aan

natuurgetrouw, vergroting, titel, etc.

(     )

(              ) 

=large knob

=small knob

Stuur foto in van de tekening van je krantenletter (pagina 146)

Preparaat + tekening haren (practicum 4)

1. Microscoop klaarzetten (kleinste vergroting = 40x) 
2. Haar bij elkaar uittrekken of knippen
3. Preparaat en plakband halen
4. Haar gekruisd op de 'slide' leggen en vastplakken met plakband
   
   
5. Scherpstellen met grote schroef, maak een foto
6. Naar 100x vergroting, met kleine schroef scherpstellen
7. Naar 400x vergroting, voorzichtig met kleine schroef! 
8. Beantwoord vraag 1 op pagina 147

the object we put under a microscope

- has to be small

- has to be very thin

- has to be put on a slide

slide preparation

- slide = a small piece of glass

- put the specimen on the glass

- add a drop of water ór colour

- put a coverslip on top

Na practicum 4 haren

Preparaat + tekening wangslijmvliescel & waterpest 

1. Microscoop klaarzetten (kleinste vergroting = 40x) 
2. Preparaat halen en in preparaatklem leggen
3. Scherpstellen met grote schroef, maak een foto
4. Naar 100x vergroting, met kleine schroef scherpstellen
5. Naar 400x vergroting, voorzichtig met kleine schroef! 

Maak tekeningen p 10 & 11 op blz. 152-153
Let op tekenregels :

Naam, klas, datum, Titel, vergroting, 
Natuurgetrouw of schematisch, Onderdelen die je herkent aanwijzen en benoemen

Cheek lining cells (practical 10)

Learning how to do Research
Microscope.  (p. 137-143)

 Read  'Preparation' page 142-143

- Make 4 (p. 144)

(     )

(              ) 

=large knob

=small knob

microscope steps

1. put slide under microscope
2. turn the smallest objective (4x)
3. put on the light
4. use large knob to focus
5. turn larger objective (10x)
6. use small knob to focus!!
7. turn objective to 40x
8. use small knob to focus!!

Today repeat Basic 2.4 Cells and microscopy

1. Know and recognize important organelles (organs of the cell) 
   
   
2. Know the difference between plant and animal cells

Biopagina: 

         cel, weefsel, orgaan, orgaanstelsel of organisme?

Checklist for Theme 2 with extra practice link (in Dutch)

Practicum 10 + 11

Tekenregels 

• Naam, klas, datum
• Titel van tekening
• Vergroting? 
• Natuurgetrouw of schematisch
• Onderdelen die je herkent -----
  aanwijzen en benoemen
  

- Finish practical 11 on page 153.

- check if you have answered all quenstion of Basic 2.4 Cells (1 t/m 7) , 2.3 Tissues and 2.1 Organs

- Make extra assignment 8 of Basic 2.4
and 10 of Basic 2.3 

What's good? 
What could be better? 

What's good? 
What could be better? 

What's good? 
What could be better? 

-------cell membrane

--------------- nucleus

--------------- cell membrane