science puzzle

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Across
  1. 3. Mechanics – study of matter and energy at atomic scales
  2. 4. a testable explanation for an observation
  3. 7. Group – a baseline used for comparison
  4. 8. – repeating experiments to confirm results
  5. 14. testing ideas through controlled procedures
  6. 15. a factor that can change in a experiment
  7. 17. method a systematic prosses of investigation
  8. 18. Change – long-term alteration of Earth’s climate
  9. 20. – interacting community of organisms and environment
Down
  1. 1. Selection – survival of organisms best adapted to their environment
  2. 2. – maintenance of internal balance
  3. 5. – change in species over time
  4. 6. a statement describing consistent natural things
  5. 9. – process plants use to make food from sunlight
  6. 10. a good, supported explanation based on evidence
  7. 11. Theory – all living things are made of cells
  8. 12. Analysis – interpreting collected information
  9. 13. (Deoxyribonucleic Acid) – genetic material of living organisms
  10. 16. Conservation – energy cannot be created or destroyed
  11. 19. Review – evaluation of research by other scientists