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.
Imagine molecules in a gas; dots spaced far apart. Add arrows to show the random motion, not all speeds (arrows) the same but...
Students will probably have met the simple molecular picture of solids, liquids and gases. Matter is, in every case, made up...
When teaching this topic, it is important to avoid your students conflating the energy analysis with an explanation of what’s...
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