Sort 29 Crossword - 7th

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Across
  1. 6. an automatic device for regulating temperature
  2. 10. characterized by or formed with evolution of heat
  3. 12. an instrument that is used for listening to someone's heart or lungs
  4. 13. an instrument that is used to measure air pressure and predict changes in the weather
  5. 16. physics that deals with the mechanical action or relations of heat
  6. 17. a stone with a hollow space inside lined with crystals or mineral matter
  7. 19. the natural features of an area
  8. 21. relating to or using the natural heat produced inside the Earth
  9. 22. the study of family ancestral lines
  10. 23. a branch of mathematics that deals with points, lines, angles, surfaces, and solids
Down
  1. 1. a length equal to 1/1000 meter
  2. 2. relating to or caused by heat
  3. 3. an instrument that indicates how fast something is going
  4. 4. the boundary of a closed plane figure
  5. 5. the use of science in solving problems
  6. 7. a changing pattern or scene
  7. 8. the distance through the center of an object from one side to the other
  8. 9. a device shaped like a long tube that you look through in order to see things that are far away
  9. 11. a science that deals with the history of the earth and its life especially as recorded in rocks
  10. 14. a long tube that contains lenses and mirrors and that is used by a person in a submarine to see above the surface of the water
  11. 15. the study of diseases and of the changes that they cause
  12. 16. an instrument used for measuring temperature
  13. 18. ideas that are believed by many people but that are not true
  14. 20. the history of a word