Across
- 2. Barely allows light to pass through
- 4. to group together based on similar traits
- 5. dark shape formed when b/ light and a surface
- 8. An object that gives off light
- 10. Bouncing of energy waves off a surface
Down
- 1. Bending or redirection of energy
- 3. Completely allowing light to pass through
- 6. Energy that allows us to see
- 7. a piece of glass or plastic shaped like a triangle
- 9. does not allow any light to pass through