Safety first
1. Work microscale (small materials,  small amount of substances).    2. Work in a tray, ALWAYS use it.   3. ampoulesLabel 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.

 
A1. Air can be compressed, water not: Caertesian diver
A2. Air has a mass
A3. Air is needed for a candle to burn
A4. Air changes above the wick of a working ampoule burner
A5. Air changes during respiration
A6. Earthworms and germinating barley also carry out respiration
A7. Even in a rain barrel mosquitos need direct contact to air for respiration
A8. Yeast fungi can live in Cola without air
A9. Carbon dioxide from Cola extinguishes fire
A10.Recycling: Green plants recycle consumed air

UNDER REVISION
A01 Air consumption during rusting
A02 Percentage of oxygen in air 1 (ThermaCare) 
A03 "A home made determination of the percent of oxygen in air" (Ibanez)
A04 Making pure oxygen by heating potassium chlorate (Teacher experiment)
A05 Density of air
A06 Influence of air pressure on the boiling point of water
A07 Respiration is a chemical reaction of air

UNDER REVISION

Dead Sea salt absorbs water vapour from the air