Y8 Chemical Reactions Crossword

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Across
  1. 1. Can be bent into a shape
  2. 3. Can be drawn into wires
  3. 7. A chemical which can cause inflammation
  4. 9. Symbols and numbers showing which elements have been chemically bonded together to make the compound.
  5. 10. A symptom of indigestion; a pain in the chest due to excess acid in the gullet/oesophagus.
  6. 12. Data (usually numbers) that can take any value
  7. 16. A series of steps used to test a question
  8. 17. Data that can be put into categories
  9. 18. solution A solution in which no more solute will dissolve.
  10. 20. A substance that changes colour depending on the solution it is in.
  11. 23. A chemical that speeds up the rate of a reaction but is not used up in the reaction.
  12. 26. A chemical which neutralises an acid
  13. 27. A chemical which can damage living tissue
  14. 30. of mass The mass of the reactants to equal to the mass of the products
  15. 32. A force applied to an area caused by particles hitting the surface of an object
  16. 33. variable The thing which is measured in an experiment
  17. 36. When iron has reacted with water and air
  18. 37. A chemical produced by neutralisation that has a metal part and a non-metal part.
  19. 38. scale A scale of numbers used to identify the strength of an acid or alkali.
  20. 40. The process by which a solid forms, where the atoms or molecules are highly organised into a structure known as a crystal.
  21. 42. The chemicals needed to start a reaction
  22. 43. Caused by excess acid being produced in the stomach and escaping to areas where cells are not protected from it.
  23. 47. reaction A reaction which takes in energy
  24. 48. When a substance gains oxygen
Down
  1. 2. Treat acidic soil with lime to reduce the pH and ensure better growth of certain crops
  2. 4. reaction A reaction which gives out energy
  3. 5. combustion A chemical reaction which occurs when fuel is burnt with plenty of oxygen
  4. 6. A reaction between an acid and a base to produce a salt plus water
  5. 8. variable The thing which is changed in an experiment
  6. 11. body temperature The temperature of the body at its’ core - in humans it is around 37.5oC
  7. 13. indicator A type of indicator which can tell you the strength of an acid or alkali
  8. 14. A group of different tissues working together to carry out a similar process
  9. 15. A compound that contains hydrogen and carbon only
  10. 19. A solution that contains oxygen and hydrogen usually used in cleaning products
  11. 21. A chemical reaction which occurs when a fuel reacts with oxygen
  12. 22. Rings like a bell when struck
  13. 24. A solution that contains hydrogen and has a sharp sour taste
  14. 25. combustion A chemical reaction which occurs when fuel is burnt with little oxygen
  15. 28. incomplete combustion A chemical reaction which occurs when fuel is burnt with very little oxygen
  16. 29. A mixture of gases that surround the Earth
  17. 31. A surface which allows light (or other waves) to bounce off it
  18. 32. The chemicals formed at the end of a reaction
  19. 34. A reaction which gives out energy.
  20. 35. A condition when the body becomes too cold and can no longer function properly
  21. 37. When a solute dissolves in a solvent
  22. 39. A force that holds to atoms together
  23. 41. A type of indicator for acids and alkalis
  24. 44. When a liquid turns into a gas. We can heat a solution gently to remove a solvent from it.
  25. 45. A reaction which occurs when an acid is added to an alkali
  26. 46. When a metal becomes dull in colour due to a reaction with oxygen