Science crossword

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Across
  1. 4. Change Change affecting physicality
  2. 7. How close to other values
  3. 8. Basic study of natural world
  4. 9. Negatively charged particles around nucleus
  5. 12. Variable Independent variable
  6. 14. Change Usually irreversible change
  7. 16. × Volume Density calculation
  8. 18. How close to correct value
  9. 21. Cannot be broken down into simpler substance
  10. 23. Two or more metals combined
  11. 24. Atoms chemically bonded
  12. 25. Study of matter, energy and interactions
  13. 26. Thing you seek to test
  14. 27. Particle with no charge in nucleus
  15. 29. Mixture of elements
  16. 30. Everything except light and heat is made of
Down
  1. 1. Deals with characteristics
  2. 2. Study of properties and changes of matter
  3. 3. Mixture Visible mixture with separable ingredients
  4. 5. Release of heat
  5. 6. Absorption of heat
  6. 10. Deals with numbers
  7. 11. Tool to measure mass
  8. 13. Facts/statistics from experiments
  9. 15. Positively charged particle in nucleus
  10. 17. Table Collection of elements
  11. 18. Tiniest particle of matter
  12. 19. Variable Dependent variable
  13. 20. Matter is measured in
  14. 22. × Width × Height Volume calculation
  15. 28. Liquid mixture