There are some BBC Bitesize revision pages that could be useful.
- What are the uses and hazards of the waves that form the electromagnetic spectrum? [Part 1] [Part 2] [Part 3]
- What are the uses and dangers of emissions from radioactive substances?
- What do we know about the origins of the Universe and how it continues to change?
An introduction to waves: Play Now | Play in Popup | Download The Electromagnetic Spectrum: Play Now | Play in Popup | Download Origins of the Universe: Play Now | Play in Popup | Download Radioactive Substances: Play Now | Play in Popup | Download Sending Information: Play Now | Play in Popup | Download
