Across
- 4. The range of colours that make up white light
- 6. Producing a lot of light
- 8. A material that allows light to pass through clearly
- 10. A dark area where light is blocked
- 13. The bouncing back of light from a surface
- 15. A block of glass that splits white light into colours
- 16. A sound that is strong and easy to hear
- 19. A material that slows down heat transfer
- 21. A sound that is soft and not easy to hear
- 22. A material that allows heat to pass through easily
Down
- 1. To give off energy in the form of waves or rays
- 2. Temperature scale used in science for absolute values
- 3. A rapid back-and-forth movement that produces sound
- 5. A material that does not let light through
- 7. Instrument used to measure temperature
- 9. Cooling process where liquid turns into gas
- 11. A reflected sound wave
- 12. The number of sound waves per second, linked to pitch
- 14. Sound transfer through a solid by direct contact
- 17. Producing very little light
- 18. A straight line showing the direction that light travels
- 20. The substance (air, water, etc.) that sound travels through