Microscopes and drawings

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Microscopes and drawings

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

 Read 'Parts of the Microscope' and 'Preparation'

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

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=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!!

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

Scientific drawing pg. 63

Goal: to show the structure of what you see

Important:

• No sketching/coloring/shading: only outlines!
• Only draw what you see
• Everything with pencil, no pens

Biological drawings

What differences do you see?

                                 natuurgetrouw                    schematisch

Views and cross-section

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External view = buitenaanzicht

longitudinal section = lengtedoorsnede

transverse section = dwarsdoorsnede

Longitudinal section

External view

Transverse section

Schematic drawing

True-to-life drawing

Example of a scientific drawing

Practical activity

• First, read the drawing rules on p. 64
• Make a true-to-life drawing of the external view of a m       mushroom
• Follow the drawing rules!