Week 39: The microscope

Microscopy

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Slide 1: Diapositive
BiologieMiddelbare schoolhavo, vwoLeerjaar 4

Cette leçon contient 27 diapositives, avec quiz interactifs, diapositives de texte et 3 vidéos.

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Microscopy

Slide 1 - Diapositive

  • What are the parts of the microscope
  • How should you operate the microscope
  • The drawings rules for microscope drawings 
learning goal

Slide 2 - Diapositive

Slide 3 - Vidéo

Slide 4 - Vidéo

1

Slide 5 - Vidéo

The biological drawing rules 
  • white paper
  • use a hb pencil
  • make large drawings
  • draw clean cut lines, do not sketch
  • draw what you see
  • fill in the drawing information (name, class, date, name of organism, enlargement, view)  
  • label parts: with a ruler, a horizontal line, name on the right side of paper, behind the line 

Slide 6 - Diapositive

Slide 7 - Diapositive

Slide 8 - Diapositive

Slide 9 - Diapositive

How to make a waterweed specimen
What do you need:
  • slide, 
  • coverslip,
  • tweezers,
  • pipette,
  • pencil

1. Take a slide and put a drop of water onto it.

2. Use the tweezers to pull off a leaf of waterweed and put it in the drop of water.

3. Slowly lower a coverslip on top of the waterweed in an angle.



Slide 10 - Diapositive

Slide 11 - Lien

Slide 12 - Diapositive

The pointing needle.
Bring what you want to view very close to the tip of the pointing needle! Focus!

Slide 13 - Diapositive

03:19
Most of the rules in this video are the same as we discussed in class, but there are also some differences. State the differences you noticed.

Slide 14 - Question ouverte

The microscope

eyepiece lens = lens, magnifies 10x
tube = holds the eyepiece lens
revolver = holds the objective lenses, turns around
objective lenses = lenses hold by the revolver. Magnify 4x, 10x and 40x
stage = holds the slide
arm = used to hold the microscope when carrying
focus knob = lets you move the stage up and down. This helps you focus the image. There is a coarse and a fine knob. 
lamp = source of light
condensor = lets you control the amount of light passing through the slide
base = this is the base the microscope stands on

Slide 15 - Diapositive

Through which part of the microscope do you look?
A
condensor
B
objective lens
C
eyepiece lens
D
revolver

Slide 16 - Quiz

revolver
objective lens
eyepiece lens
tube
turning piece that holds objective lenses
holds the eyepiece lens
lens, magnifies 10x
lens, magnifies 4x, 10x and 40x

Slide 17 - Question de remorquage

What is the function of the condensor?
A
magnify the object
B
control amount of light
C
to hold the microscope
D
turn microscope on/off

Slide 18 - Quiz

Which part lets you focus the image?

Slide 19 - Carte mentale

What is the use of the objective lenses?
A
magnify image
B
control amount of light
C
move the object up and down
D
sturdiness

Slide 20 - Quiz

base
focus knob
condensor
stage
objective lens
tube

Slide 21 - Question de remorquage

What are you no longer allowed to do once you switch form the red objective lens to one of the others?
A
make changes to the amount of light
B
turn the revolver
C
turn the coarse focus knob
D
turn the fine focus knob

Slide 22 - Quiz

What is part 2?

Slide 23 - Question ouverte

In what state should you hand in the microscope?
A
stage down, smallest objective lens above stage
B
stage up, smallest objective lens above stage
C
stage down, largest objective lens above stage
D
stage up, largest objective lens above stage

Slide 24 - Quiz

Make a plan of action on how to properly focus the microscope on your object. Take a picture of this list (on paper) and upload here

Slide 25 - Question ouverte

Summarise (on paper) the drawing rules for yourself and upload a picture of it below

Slide 26 - Question ouverte

We will have a microscope lesson soon.
You are allowed to use:

  • your plan of action for focussing the microscope. 
  • your summary of the drawing rules 
  • a pencil, eraser and ruler. 

Slide 27 - Diapositive