Across
- 2. what people used to send messages before phones
- 4. organs eyes ears nose skin and tongue.
- 6. Colored part of the eye
- 9. using reflected sound waves to find objects
- 11. lets some light go through
- 12. not letting light through
- 13. getting or giving information to someone else
- 15. nervous system brain and spinal cord
- 17. a way to "see" things underwater using sound
- 18. ones and zeros
- 19. a clear thing that focuses light
- 20. things that fly around earth in space
Down
- 1. like when you see yourself in a mirror or water
- 3. Nerves that run up and down the back and transmit most messages between the body and brain
- 5. using numbers
- 7. Bending of light
- 8. curving outward
- 10. sight taste touch smell and hearing
- 13. write commands for a computer
- 14. clear
- 15. curving inward
- 16. nerves that aren't your brain and spinalcolumn