Thames & Kosmos Kids First: Biology Lab handleiding

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Thames & Kosmos

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Handleiding

Microscopy Basics

NATURAL FIBERS

The prepared slide contains the

three natural fibers cotton, wool,

and silk. They are all artificially

colored. You will be able to see the

characteristic qualities of the

various fibers under the microscope.

Cotton fibers are flattened and

often twisted. They have thick edges

(cell walls). The wool (sheep’s hair)

is thick and round, hollow, and with

scaly cell walls. Silk, by contrast, is

a lot thinner with no hollow interior,

with a smooth and even surface that

makes it look similar to an artificial

fiber (such as polyester or nylon).

TIP!

You can use the mirror

for illumination instead

of the light bulb. With

the proper adjustment,

you can use it to guide

the light from your desk

lamp or the sun through

the hole in the

microscope stage.

Cotton

Silk

Wool

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