science project (some clues are backwards)

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Across
  1. 3. factors in an experiment that remain the same
  2. 8. egnahc
  3. 9. eltit eht fo drow tsrif eht
  4. 10. the base units in science
  5. 11. txen neppah lliw tahw gniyas
  6. 12. factors in an experiment that remain the same
  7. 13. snoitavresbon fo yrammus nettirw ro nekops a
Down
  1. 1. an interpretation of observations
  2. 2. (no spaces) erutan ni nrettpa a
  3. 4. the second step
  4. 5. (no spaces)the first rule of lab safety
  5. 6. (no spaces)what class we are doing
  6. 7. gnirahs
  7. 14. (no spaces) contains some factors as the experimental group