Y8 Chemical Reactions Crossword

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Across
  1. 3. A chemical which can cause inflammation
  2. 5. When a liquid turns into a gas. We can heat a solution gently to remove a solvent from it.
  3. 7. A chemical which neutralises an acid
  4. 9. The chemicals formed at the end of a reaction
  5. 15. A chemical that speeds up the rate of a reaction but is not used up in the reaction.
  6. 17. A surface which allows light (or other waves) to bounce off it
  7. 19. combustion A chemical reaction which occurs when fuel is burnt with plenty of oxygen
  8. 21. The chemicals needed to start a reaction
  9. 22. A reaction which occurs when an acid is added to an alkali
  10. 24. A solution that contains hydrogen and has a sharp sour taste
  11. 26. Rings like a bell when struck
  12. 27. Caused by excess acid being produced in the stomach and escaping to areas where cells are not protected from it.
  13. 31. Can be bent into a shape
  14. 32. A force that holds to atoms together
  15. 33. scale A scale of numbers used to identify the strength of an acid or alkali.
  16. 34. Treat acidic soil with lime to reduce the pH and ensure better growth of certain crops
  17. 35. Can be drawn into wires
  18. 36. When a solute dissolves in a solvent
  19. 37. A chemical produced by neutralisation that has a metal part and a non-metal part.
  20. 38. A reaction which gives out energy.
Down
  1. 1. The process by which a solid forms, where the atoms or molecules are highly organised into a structure known as a crystal.
  2. 2. When a substance gains oxygen
  3. 4. A chemical reaction which occurs when a fuel reacts with oxygen
  4. 6. indicator A type of indicator which can tell you the strength of an acid or alkali
  5. 8. A reaction which takes in energy
  6. 10. When iron has reacted with water and air
  7. 11. Symbols and numbers showing which elements have been chemically bonded together to make the compound.
  8. 12. A substance that changes colour depending on the solution it is in.
  9. 13. When a metal becomes dull in colour due to a reaction with oxygen
  10. 14. A compound that contains hydrogen and carbon only
  11. 16. A symptom of indigestion; a pain in the chest due to excess acid in the gullet/oesophagus.
  12. 18. A solution in which no more solute will dissolve.
  13. 20. A mixture of gases that surround the Earth
  14. 23. A solution that contains oxygen and hydrogen usually used in cleaning products
  15. 25. A chemical which can damage living tissue
  16. 28. combustion A chemical reaction which occurs when fuel is burnt with little oxygen
  17. 29. variable The thing which is measured in an experiment
  18. 30. variable The thing which is changed in an experiment
  19. 34. A paper indicator for acids and alkalis