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Across 1. a line that rises and falls 5. a transparent block of glass that can divide white light into different colors 7. to send out or away from 9. to cause to begin functioning 11. existing as a unique entity 13. a black, dense amtter that can be burned as fuel 16. to know of something through one of the five senses 17. to move or keep things away from each other , synonym. part 19. the beginning or starting point of something syn. origin 20. a thing that is result of many things put together 21. the action of ligh or sound changing direction as a result of bouncing off a surface

Down 2. the capacity that something has to work, move bring about change 3. an entity that is not living, synonym. thing 4. the course along which something could move, syn. move 6. the range of colors in white light visible when separated by prism 8. to carefully consider the parts that make up some situation synonym. dissect 10. to move away from a surface as a result of striking it. 12. happening right away without any time being lost syn. instantly 14. to present something or convey a meaning in the form of sign 15. to constitute 18. to draw in