Blue B Sort #29

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Across
  1. 5. a device, that functions to establish or maintain a desired temperature
  2. 7. a line marking off an area
  3. 9. a hollow stone often lined with crystals
  4. 10. an instrument on an automobile or other vehicle for indicating the rate of travel in miles
  5. 11. a set of stories, traditions, or beliefs associated with a particular group
  6. 12. relationships between organisms and their environment
  7. 14. a unit of length
  8. 15. an optical instrument for making distant objects appear larger and therefore nearer
Down
  1. 1. the topographical features of a region
  2. 2. an instrument used to measure heart rate
  3. 3. a unit of length to one thousandth of a meter
  4. 4. of or relating to the internal heat of the earth
  5. 6. the science that deals with the dynamics and physical history of the earth
  6. 8. a optical instrument having a magnifying lens
  7. 13. a container lined with an insulating material