Demonstration: This is a classic demonstration that gives strong circumstantial evidence for the particulate nature of vapours...
Demonstration: A classic demonstration that is explained satisfactorily by a particulate model of gases. The students first...
Class practical: Here phosphor bronze balls model a small volume of a gas.
Class practical: Students use marbles in a tray to explore models.
Class practical: Students use marbles in a tray to model the expansion of liquids and gases.
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