4.3.1 Changes of state and the particle model

You will need to use a combination of the materials we have collected here to enable you to succeed. The most important factor will always be your effort. Use the knowledge of your teacher, attend revision sessions, ask when you need help. Most importantly of all, stay confident! You can do this!

Learning Checklist & Knowledge Organiser

4.3.1 Changes of state and the particle model

Calculate the density of a material by recalling and applying the equation: [ ρ = m/V ]
Recognise/draw simple diagrams to model the difference between solids, liquids and gases
Use the particle model to explain the properties of different states of matter and differences in the density of materials
Required practical 5: use appropriate apparatus to make and record the measurements needed to determine the densities of regular and irregular solid objects and liquids
Recall and describe the names of the processes by which substances change state
Use the particle model to explain why a change of state is reversible and affects the properties of a substance, but not its mass