Chapter 2 Key Terms

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. Not transmitting or reflecting light or radiant energy (6)
  2. 5. Device that takes photographs (6)
  3. 6. A magnifier of images of distant objects (9)
  4. 7. A showy growth of e.g. feathers or skin on the head of a bird or other animal (5)
  5. 9. The distance between two points in the same phase in consecutive cycles of a wave (10)
  6. 10. Magnifier of the image of small objects (10)
  7. 12. Any of three ___ from which all others can be obtained by mixing (plural) (13)
  8. 14. Any substance whose presence in plant or animal tissues produces a characteristic color (7)
  9. 15. A means or instrumentality for storing or communicating information (6)
  10. 16. The innermost light-sensitive membrane covering the back wall of the eyeball (6)

Down

  1. 1. The change in direction of a propagating wave when passing from one medium to another (10)
  2. 2. The concentration of attention or energy on something (10)
  3. 4. A narrow depression (6)
  4. 8. So thin as to ___ light (11)
  5. 11. The transparent dome-shaped anterior portion of the outer covering of the eye (6)
  6. 13. The goal intended to be attained (9)