Across
- 2. the height of a wave
- 9. a wave that can travel through a vacuum
- 12. a molecule made of carbon and two oxygen
- 13. the pigment in skin that helps absorb UV light for protection
- 15. high-energy light from the sun that can cause skin cancer
- 17. the lowest point of a wave
- 20. a doctor who specializes in vision
- 22. when a wave bends as it moves between mediums
- 23. the number of waves in a certain amount of time
- 24. the specific gas layer in the atmosphere that blocks most UV rays
Down
- 1. the molecule in our cells that can be damaged
- 3. signals sent as discrete pulses that are reliable
- 4. signals sent as continuous, varying waves
- 5. the layer of gases surrounding Earth
- 6. a doctor who specializes in hearing and sound
- 7. a pattern of motion that transfers energy
- 8. when a wave passes through a material
- 10. the material through which a sound wave travels
- 11. the distance from one crest to the next
- 14. anything that has mass and takes up space
- 16. a wave that requires a medium to travel
- 18. when a wave bounces off a surface
- 19. the highest point of a wave
- 21. when a material takes in energy