Nathan's Crossword Puzzle

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Across
  1. 1. an apparatus consisting of a tube attached to a set of mirrors or prisms, by which an observer (typically in a submerged submarine or behind a high obstacle) can see things that are otherwise out of sight.
  2. 4. An instrument for telling temperature
  3. 6. the study of the origin of words and the way in which their meanings have changed throughout history.
  4. 8. scientific study of the behavior, structure, physiology, classification, and distribution of animals.
  5. 9. a metric unit of length equal to 1,000 meters (approximately 0.62 miles).
  6. 10. an optical instrument designed to make distant objects appear nearer
  7. 13. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
  8. 14. the study of myths
  9. 15. device that automatically regulates temperature, or that activates a device when the temperature reaches a certain point.
Down
  1. 2. an instrument on a vehicle's dashboard indicating its speed.
  2. 3. instrument measuring atmospheric pressure, used especially in forecasting the weather
  3. 5. an account of a person's life written by that person.
  4. 7. optical instrument used for viewing small objects, such as plant cells, usually magnified several hundred times.
  5. 11. the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
  6. 12. The study of land