Across
- 3. mixing red and blue light
- 6. letting some light through by not clear
- 8. a rare magnetic rock
- 9. not letting any light through
- 11. heat moving through air or liquid
- 12. plate on which sand moves in patterns
- 13. science of sound
- 14. heat moving in rays
- 15. highness or lowness of sound
Down
- 1. using senses to notice what is happening
- 2. word that sounds like the noise it describes
- 4. a guess you can test in an experiment
- 5. a triangular glass that splits light into colour
- 7. when heat moves through a solid object
- 10. to spread or travel