Chemistry Paper 2 - Triple Higher

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Across
  1. 2. small amounts of other substances within the 'main' substance
  2. 6. Melting and recasting or reforming into different products.
  3. 9. An absence of oxygen. A process that does not require oxygen.
  4. 10. When the value of a measurement is close to the true value.
  5. 12. the sum of all values divided by the total number of values
  6. 13. a substance that speeds up a reaction by offering an alternative pathway with a lower activation energy.
  7. 17. is the steepness and direction of a line as read from left to right
  8. 18. A process to separate a liquid solvent from a mixture and collect it
  9. 19. A suspension of particles in a liquid formed when a dissolved substance reacts to form an insoluble substance, eg in a precipitation reaction.
  10. 20. A limited amount of something. It will run out eventually.
  11. 21. A compound made of only hydrogen and carbon
  12. 22. An unsaturated hydrocarbon
Down
  1. 1. Can be replaced at the same rate they are being used up.
  2. 3. a single element or compound, not mixed with any other substance
  3. 4. A chemical reaction that gives takes in energy from the surroundings
  4. 5. a mixture that has been designed as a useful product.
  5. 7. The number of molecules of a substance in a given volume.
  6. 8. physical signs, documents, images, etc, suggesting a certain theory is true
  7. 10. A saturated hydrocarbon
  8. 11. fine solids or liquid particles suspended in air that are individually invisible to the naked eye
  9. 14. the process by which green plants and some other organisms use sunlight to create glucose and oxygen from water and CO₂
  10. 15. A chemical reaction that gives out energy to the surroundings
  11. 16. With oxygen. Relating to, involving or requiring oxygen.