Weeks 3-4 by brinenia

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Across
  1. 1. come into forcible contact with another object.
  2. 4. an activity that involves making something
  3. 5. a person who designs, builds, or maintains engines, machines, or public works.
  4. 6. using or involving ellipsis
  5. 8. causing a piece of machinery or other mechanism to revert to a safe condition
  6. 10. branch of science
  7. 11. the position of being a sponsor
  8. 12. commercial
  9. 13. a movement or series of moves requiring skill and care.
Down
  1. 2. instrument capable of detecting the vibrations
  2. 3. form of electromagnetic radiation
  3. 7. to start
  4. 9. heat-sensitive thermal imaging cameras
  5. 10. water