KS3 Unit 3 - Chemical Substances Crossword

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Across
  1. 2. a process or reaction that releases energy from the system to its surroundings, usually in the form of heat or light.
  2. 3. a change which forms one or more new substances.
  3. 6. the process of producing crystals from a solution by slowly evaporating the solvent.
  4. 8. a substance that cannot be split up into anything simpler by chemical reactions. All the atoms in an element are the same.
  5. 11. a substance that does not have anything else in it.
  6. 12. two or more atoms joined together.
  7. 15. chemicals that form new substances during a chemical reaction.
  8. 17. a material which lets energy flow through it easily.
  9. 20. separating things that have not dissolved from a liquid. The liquid is passed through a filter to do this.
  10. 23. a burning reaction, when a fuel combines with oxygen and releases energy.
  11. 25. liquids that will not stay mixed together.
  12. 28. anything that stores energy that can be converted into heat energy, e.g. fossil fuels and nuclear fuels.
  13. 29. a characteristic of matter that may be observed or measured without changing he chemical (e.g. flexible/rigid, hard/soft, malleable, magnetic…)
  14. 30. the solid that has dissolved in a liquid to make a solution.
  15. 31. a new chemical formed in a chemical reaction.
  16. 33. the liquid that runs through filer paper.
  17. 35. a prefix meaning ‘two’. This is something used in compound names to indicate that there are two of a particular element, e.g. carbon dioxide.
  18. 36. the solid bits that are trapped by filter paper.
  19. 37. when a solid has dissolved in a liquid.
  20. 38. a metal (steel, iron, nickel or cobalt) that can be magnetised or attracted to a magnet.
Down
  1. 1. a reaction in which new substances are made.
  2. 4. when a liquid turns into a gas.
  3. 5. the smallest part of an element.
  4. 7. separating dissolved solids from one another. The solids are usually coloured.
  5. 9. a substance containing two or more elements that are not chemically joined.
  6. 10. physical methods to separate mixtures.
  7. 13. substances that can be split into simpler substances.
  8. 14. a change where no new substances are formed.
  9. 16. something that is soluble can dissolve in a liquid.
  10. 18. the process of separating a liquid from a solution by evaporating a liquid then condensing it.
  11. 19. a dried piece of paper produced by chronography.
  12. 21. something that does not dissolve is said to be insoluble.
  13. 22. a compound formed when something reacts with oxygen.
  14. 24. mixtures of elements, mixtures of compounds, or mixtures of elements and compounds.
  15. 26. a solution that contains as much dissolved solid as it possibly can.
  16. 27. a liquid used to dissolve things.
  17. 32. reaction of a substance with oxygen to produce a compound containing oxygen (oxygen has been ‘added’ to the original substance).
  18. 34. when a substance splits up and mixes with a liquid to make a solution.