Thames & Kosmos Creative Cosmetics Lab handleiding
Handleiding
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1
The long chains of
starch molecules are
normally all coiled up, so pulling on the shower dough quickly
causes the starch molecules to become entangled with each
other and break apart. But when you pull on the shower dough
slowly, the starch molecules are able to slide past each other
easily and the dough stretches instead of breaking.
Plants use starch as a way to store
energy. They can add more glucose
molecules to the chain when they
want to store energy and remove
them when they need to burn energy.
Liquid or solid?
YOU WILL NEED
Shower dough from Experiment 12
HERE’S HOW
1
Try pulling the shower dough apart
slowly, and then quickly. What do you
observe happens to the shower dough?
A single polymer
molecule is made
up of hundreds
of thousands of
repeating units
known as monomers.
The monomers may
be identical or they may vary.
The monomer in starch is a sugar
molecule called glucose.
What Is Starch?
Why does the shower dough break
when you pull it quickly but
stretch when you pull it slowly?
A substance called starch gives
it this property. Starch belongs
to a group of molecules called
polymers.
Starch
Fast
Slow
EXPERIMENT 13
Polymers
27
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Productinformatie
| Merk | Thames & Kosmos |
| Model | Creative Cosmetics Lab |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10798 MB |
