Across
- 2. A representation of something to explain or understand it.
- 4. The colored part of the eye that controls the pupil's size.
- 7. Material that allows almost all light to pass through.
- 11. The factor in an experiment that changes because of another variable.
- 12. When light bounces in many directions after hitting particles.
- 14. The process of coating glass with a reflective layer.
- 15. The nerve that carries signals from the eye to the brain.
- 16. A smaller or larger version of something to study or show it.
Down
- 1. The part of the eye that receives light and sends signals to the brain.
- 3. Material that does not let light pass through.
- 5. To bounce back light, sound, or heat.
- 6. Glass that reflects on one side and is see-through on the other.
- 7. To allow light to pass through.
- 8. A group of parts that work together.
- 9. The opening in the center of the eye that lets in light.
- 10. The part of the eye that focuses light onto the retina.
- 13. The clear front part of the eye.