Air and water from Carole Paquette – this powerpoint covers most of what you need to know.
WATER:
IGCSE Chemistry topic 11, part 1 – Water:
A short video form The Virtual School – testing for water:
AIR:
IGCSE Chemistry topic 11, part 2 – Air:
RUSTING:
IGCSE Chemistry topic 11, part 3 – Air: rusting & carbon dioxide:
IGCSE Chemistry, a 25m lesson from ChemistryKlipz covers rusting from 11m to 13m 50s.
GCSE s-cool – Rusting – revision notes.