.....air01 Air has mass
....air02 An indirect method to change the volume of air by pressure
....air03 Visualise the molar volume of air under different temperatures
...air04 A second fire extinguishing gas in the air
...air05 Air can be liquefied, nitrogen evaporates first
air06 Distillation of liquid air (Model experiment)
air07 Liquid air expands extremely during evaporation
air08 Visualisation by beads: Liquid air expands extremely during evaporation
.air09 Liquid nitrogen makes plant tissues brittle like glass
.air10 Photosynthesis provides fresh air and the building materials for plants