Science Crossword Puzzle!

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Across
  1. 4. the variables that is observed or measured in a fair test;result
  2. 6. the use of scientific knowledge to solve problems
  3. 9. problem with a design that need improvement
  4. 11. standards by which something is judged
  5. 12. an early model of a design
  6. 13. the process for devising structures or systems to meet specific needs
  7. 14. to suggest and discuss ideas for solving a problem
  8. 15. something that can be changed, controlled, or measured(in science)
Down
  1. 1. a person with scientific training who designs structures and systems that address specific needs
  2. 2. the variables that is changed in a fair test
  3. 3. test an investigation in which one variable is changed and all other variables are kept the same
  4. 5. the variables that are kept the same in a fair test
  5. 7. limitation
  6. 8. scientific principals for designing and building structures and systems to address specific
  7. 10. a series of flexible steps that move an engineer from problem to solution