Across
- 5. hair like extensions
- 6. opening in a camera lets light in
- 7. respond
- 11. living things
- 13. combination of 2 or more different pure substances
- 15. way of separating solutions
- 16. basic unit of life
- 19. specialized cells for the nervous system
- 20. addictive drug in cigarettes
- 22. purpose or task
- 24. wheels with teeth
Down
- 1. area that drains into one main lake or river
- 2. force that opposes motion
- 3. change in water level
- 4. bubbled out lens in the middle
- 6. thick-walled blood vessels
- 8. martial sensitive to light
- 9. group of organisms same species
- 10. dark sticky substance formed when tobacco burns
- 12. device that helps us do work
- 14. has no fixed shape
- 16. caved in lens
- 17. keep track of something
- 18. short for picture element
- 21. carries out chemical digestion
- 23. group of tissues