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M.K. El-Marsafy, P. Schwarz, M. Najdoski



MicrEcol = Low-cost microscale experiments

2. Experiments with air

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Safety first
1. Work microscale (small materials,  small amount of substances).    2. Work in a tray, ALWAYS use it.   3.  ampoules Label first fill later        
4. Sýringes only from a pharmacy.  5.  Even a candle burner must be used inside a tray.   6. Bind long hairs together.    7. Extinguish burners immediately after use.  8. Wear googles for chemical experiments.      9.  Carefully wash your hands after experimentation.     10. Do not eat during experimentation.

A04 Earth worms and plants also need respiration
A05 Respiration of mosquitos needs air even in a water butt
A06 Yeast can thrive in Cola without air, producing big quantities of carbon dioxide
A07Green plants recycle consumed air
.A09 Combustion in air and in pure oxygen (Teacher experiment)
A10 Steel wool (iron) changes its mass during combustion
A12 Steel wool changes its mass during rusting
A13 Cola can rust in a different way
A13a Rust protection by zinc coating
A13b Rust protection by tin coating
A13c Rust protection by plastic coating
A14   Zinc/air "battery": Electricity for a hearing aid

back....... .........first published: 08.10.2001...............last modification: 23.04.2010