Across
- 3. not able to send back an echo
- 5. in front of
- 9. magnitude of a wave
- 11. structures that return stronger echoes of sound waves (bright white)
- 12. toward the point of origin or trunk
- 15. structures that return weaker echoes of sound waves (gray/black)
- 16. detects blood flow
- 18. higher toward the head
Down
- 1. distance between successive crests of a wave
- 2. toward the middle or center
- 4. away from the point of origin or trunk
- 6. number of periods or cycles per time period
- 7. lower away from the head
- 8. toward the side
- 10. converts energy from one form to another
- 13. toward the back
- 14. able to send back an echo
- 17. amount of time it takes for a wave to complete one cycle