Sort 29 Crossword - 7th

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