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