science

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Across
  1. 3. a change of state where a liquid is heated and changes to a gas within the liquid
  2. 9. the change of state where a liquid changes to a gas at the surface of the liquid
  3. 11. substances made of lattices or identical molecules with two or more types of atoms
  4. 15. shiny
  5. 16. the change of state when a solid is heated and forms a liquid
  6. 17. the chemical reaction in plants that converts carbon dioxide and water into oxygen and glucose using energy from the Sun
  7. 19. easily crumbled or shattered
  8. 20. the first chemical explosive; made up of a mixture of saltpetre, sulfur and carbon
Down
  1. 1. a process where two liquids or two gases mix due to the motion of their particles
  2. 2. any combination of two or more elements and compounds
  3. 4. describes a substance
  4. 5. the chemical property of a substance that describes how easily the substance undergoes combustion
  5. 6. an increase in size
  6. 7. grid-like structures of atoms
  7. 8. a substance that dissolves another substance
  8. 10. the basic particles that make up all substances
  9. 12. mixture of a metal with other metals or non-metals
  10. 13. able to be stretched to form a wire
  11. 14. a substance made up of long chains of smaller units that are repeated along the chain
  12. 18. an alloy of iron and carbon that is much harder than
  13. 19. an alloy of copper and tin that is much harder than pure copper