Across
- 5. red, green and blue colors are examples of ___ primary colors
- 7. high frequency sound wave (two words)
- 8. something that you blow with a high pitched sound
- 9. sound waves with frequencies above 20,000 hertz
Down
- 1. Sound waves with frequencies below 20 hertz
- 2. red and green
- 3. low frequency sound wave (two words)
- 4. sensation of a frequency
- 6. ___ is the absence of light (color)