STEM Majors Crossword Puzzle

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Across
  1. 6. The scientific study of ecosystems and their environment (9 letters)
  2. 8. The study of Earth's physical structure and substance (7 letters)
  3. 10. The art and technique of designing and building structures (12 letters)
  4. 13. The science of computers and computational systems (11 letters)
  5. 14. The science of numbers, quantities, and shapes (11 letters)
  6. 15. The study of living organisms (7 letters)
Down
  1. 1. The application of scientific knowledge for practical purposes (10 letters)
  2. 2. The study of drugs and their effects on the human body (10 letters)
  3. 3. The Branch of science that deals with celestial objects, space, and the universe (9 letters)
  4. 4. The study of matter and energy and the interactions between them (8 letters)
  5. 5. The science of flight and the design of aircraft (11 letters)
  6. 7. The discipline concerned with the design, building, and use of machines (11 letters)
  7. 9. The branch of biology that deals with heredity and the variation of organisms (7 letters)
  8. 11. The branch of science dealing with chemical compounds and their reactions (8 letters)
  9. 12. The scientific study of behavior and mental processes (10 letters)