Description
This unit defines density and explores how it varies between states of matter based on atomic arrangement. It covers mass conservation during physical changes, gas behaviour, fluid pressure, buoyancy, and atmospheric pressure, and calculations involving density, mass, and volume relationships.
This unit builds on pupils’ prior learning from Heating and cooling, where they explored energy transfer between objects due to temperature differences. It deepens their understanding by examining how particle behaviour explains density and pressure in different states of matter, highlighting how particles’ arrangement and movement affect these properties. This prepares pupils for the next unit, Energy of moving objects, where they will apply their knowledge of particle dynamics to understand energy changes in moving systems, reinforcing the connection between thermal processes and energy.
