The nature of matter

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Across
  1. 6. a reaction that alters the chemical composition of a substance
  2. 8. the oxidation of iron into rust
  3. 11. gas to liquid
  4. 12. an example of matter that you use for online classes
  5. 13. a process by which plants make energy
  6. 15. movement from liquid to gas
  7. 17. the arrangement of particles far apart
Down
  1. 1. a sign of a chemical change
  2. 2. solid to liquid
  3. 3. the idea that matter consisted of particles
  4. 4. describe the physical characteristics of a substance
  5. 5. movement from liquid to solid
  6. 7. burning of fuel
  7. 9. the study of matter
  8. 10. the arrangement of paticles close together
  9. 14. particles that move round each other
  10. 16. made up of small particles