Revision Notes

2.1.1 States of Matter

Solids, Liquids & Gases

  • Matter can exist in one of three different states:


Shape and volume, IGCSE & GCSE Physics revision notes

Diagram showing the 3 states of matter in terms of shape and volume


  • Solids
    • Solids have a definite shape (they are rigid)
    • Solids have a definite volume
  • Liquids
    • Liquids have no definite shape – they are able to flow, and will take the shape of a container
    • Liquids have a definite volume
  • Gases
    • Gases have no definite shape – they will take the shape of their container
    • Gases have no fixed volume – if placed in an evacuated container they will expand to fill the container. They are also highly compressible


Author: Jenna

Jenna studied at Cardiff University before training to become a science teacher at the University of Bath specialising in Biology (although she loves teaching all three sciences at GCSE level!). Teaching is her passion, and with 10 years experience teaching across a wide range of specifications – from GCSE and A Level Biology in the UK to IGCSE and IB Biology internationally – she knows what is required to pass those Biology exams.

Join Save My Exams

Download all our Revision Notes as PDFs

Try a Free Sample of our revision notes as a printable PDF.

Join Now
Go to Top