Across
- 2. Chemical reaction lighting
- 5. Clear substance
- 7. Something that blocks light
- 10. Straight line that represents light
- 11. Does not give off light
- 12. Emission of visible light by a hot object
- 13. Partly clear substance
Down
- 1. Chemical reaction in a living thing
- 3. Persistent emission of light following exsporeto and removal of a source
- 4. The model that tells us that light gravels in straight lines
- 6. If it gives of light
- 8. Energy transfer that does not require matter
- 9. How light spreads out
- 14. Form of energy that we can see