Across
- 6. anything that people or animals can hear with their ears.
- 8. a thin beam of light or some other radiation.
- 9. heat, light, or an image that bounces off an object or surface.
- 11. the form that energy takes when traveling.
- 12. letting only some light through so that what can be seen on the other side is not clear.
- 14. the dark image cast on some surface by a person or thing blocking the light.
Down
- 1. giving off light.
- 2. continuous quick, slight shaking movement.
- 3. letting light pass through and giving a clear view of objects on the other side.
- 4. heat, light, or an image that bounces off an object or surface.
- 5. an object that receives light.
- 7. not letting light pass through.
- 10. abitlity to do work.
- 13. the form of energy that makes it possible for the eye to see.