teach

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Across
  1. 2. Glass opening in a wall
  2. 3. Area for growing plants
  3. 4. Complete path that an electric current can flow through
  4. 6. Device for communication
  5. 8. Large area covered with trees
  6. 11. Device that detects or measures a physical property
  7. 13. Structure that spans a physical obstacle
  8. 14. helmet Protective hard hat worn on construction sites
  9. 16. Instrument for measuring time
  10. 17. Enclosed channel for conveying air, cables, or other utilities
  11. 18. Arid land with little precipitation
  12. 22. Company or person that supplies goods or services to a project
  13. 23. Thin material for writing on
  14. 25. Large celestial body orbiting a star
  15. 29. Tall machine used for lifting and moving heavy objects
  16. 30. Land mass surrounded by water
  17. 31. System of communication used by a country
  18. 32. Organized examination or checking of work and equipment
Down
  1. 1. Long system of pipes for transporting fluids over distance
  2. 5. Study of past events
  3. 7. Flexible tube for conveying water, air, or other fluids
  4. 9. Temporary platform used for working at height
  5. 10. Tool used to grip and turn nuts or bolts
  6. 11. Systematic study of the structure and behavior of the physical world
  7. 12. Seal placed between surfaces to prevent leaks
  8. 15. Ideas, customs, and social behavior of a people
  9. 19. Threaded metal fastener used with a nut
  10. 20. Device that starts, stops, or regulates the flow of a fluid
  11. 21. Instrument for viewing distant objects
  12. 22. Mountain that erupts with lava
  13. 24. Process of joining metals by melting them together
  14. 26. Machine that converts energy into motion
  15. 27. Device that controls the flow of a fluid
  16. 28. Instrument showing magnetic north