Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

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Across: 2. waves that travel at 300000000 m/s in space 5. too much exposure to UV can cause this to happen to skin 6. a connection between use of sunbeds and skin cancer? 7. these waves have a warming effect on the skin but you cannot see them 11. name for the family of electromagnetic waves 12. the result to this is an effect! 13. waves used in hospitals and by dentists 15. you need to tune in to receive these waves

Down: 1. sun screen is needed for these waves 3. something which carries energy and spreads out from its source 4. used by mobile phones and satellite communications 8. waves used to sterilize medical instruments 9. description of waves that knock one or more electrons from atoms! 10. a positive outcome when certain waves are used 14. certain waves give rise to this when they are used